Math crossword puzzle with arithmetic and time-related clues for students.

Let's solve this crossword puzzle step by step. We'll go through each clue, calculate or deduce the answer, and fill in the grid accordingly.

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ACROSS

1. 150, 161, ____, 183, 194, 205...
This is an arithmetic sequence.
161 - 150 = 11
183 - 161 = 22 → Not consistent? Wait, let's check:
150 to 161 = +11
161 to ? = ?
183 - 161 = 22 → not +11. Maybe it's increasing by 11 each time?
150, 161 (+11), 172 (+11), 183 (+11), 194 (+11), 205 (+11) → Yes!
So missing number is 172

> ✔ 172

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4. 1824 divided by 12 = ___
1824 ÷ 12 = ?
12 × 150 = 1800
1824 - 1800 = 24 → 12 × 2 = 24 → total = 152
> ✔ 152

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6. 4 hours = ___ minutes
4 × 60 = 240
> ✔ 240

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7. Bill started work at 8:00 a.m. He worked for 6½ hours before he took a break. What time did he take his break? (Answer: ___, __ p.m.)
8:00 a.m. + 6 hours = 2:00 p.m.
+ 30 minutes = 2:30 p.m.
> ✔ 2:30

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8. Round 866 to the nearest 10.
866 → 870
> ✔ 870

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10. (12 - 7) X 63 =
(5) × 63 = 315
> ✔ 315

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12. 1,000 + 600 + 50 + 4 =
= 1,654
> ✔ 1654

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14. 60 X 25 =
60 × 25 = 1,500
> ✔ 1500

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15. (129 X 2) X 2 =
129 × 2 = 258 → 258 × 2 = 516
> ✔ 516

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17. Angela went to bed at 8:30 p.m. She slept for 8 hours and 45 minutes. What time did she wake up? (Answer: ___, __ a.m.)
8:30 p.m. + 8 hours = 4:30 a.m.
+ 45 minutes = 5:15 a.m.
> ✔ 5:15

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19. The train was scheduled to leave at 6:10 p.m. It left 1 hour and 30 minutes late. What time did it leave? (Answer: ___, __ p.m.)
6:10 p.m. + 1 hour = 7:10 p.m.
+ 30 minutes = 7:40 p.m.
> ✔ 7:40

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21. 11 + 11 =
22
> ✔ 22

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22. 554 divided by 2 =
554 ÷ 2 = 277
> ✔ 277

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23. 30 days = ___ hours
30 × 24 = 720
> ✔ 720

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DOWN

1. (5 X 15) + 37 =
25 + 37 = 62
> ✔ 62

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2. School starts at 7:50 a.m. The school day is 6 hours and 30 minutes long. What time does school get out?
7:50 a.m. + 6 hours = 1:50 p.m.
+ 30 minutes = 2:20 p.m.
> ✔ 2:20

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3. 47 X 43 =
Use multiplication:
47 × 40 = 1880
47 × 3 = 141
Total = 1880 + 141 = 2021
> ✔ 2021

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4. 1 dollar + 7 nickels + 3 pennies = ___ seconds
Wait — this says "seconds"? That seems odd. Let's read carefully:
"1 dollar + 7 nickels + 3 pennies = ___ seconds" — but dollars are money, not time. Probably typo?

But look at context: likely meant to be value in cents, and maybe it's a trick?

Wait — no, the clue says "= ___ seconds", but that doesn't make sense unless it's about time conversion.

But perhaps it's asking for value in cents, and the answer is a number, which will go into the grid. But why "seconds"?

Wait — maybe it's a typo. Or perhaps it's meant to be how many seconds are equal to that amount of money? No, that doesn’t make sense.

Alternatively, maybe it’s just asking for the total value in cents, and “seconds” is a mistake.

Let’s compute:

- 1 dollar = 100 cents
- 7 nickels = 7 × 5 = 35 cents
- 3 pennies = 3 cents
Total = 100 + 35 + 3 = 138 cents

But clue says "= ___ seconds" — that can't be.

Wait — maybe it's 1 dollar + 7 nickels + 3 pennies = ___ cents? Then answer is 138.

But clue says "seconds". Hmm.

Alternatively, could it be how many seconds in a certain amount of time? Doesn't fit.

Wait — perhaps it's a misprint, and it should be cents. Since all other clues are math, and this one is monetary.

But let's check if 138 fits with any crossing clues.

Look at Across 1: 172
Across 4: 152
Across 6: 240
Across 7: 2:30 → two digits, so likely 2 and 30

Down 4 crosses with Across 1 (172), so Down 4 must start with 1.

If Down 4 is 138, then first digit is 1 — possible.

But clue says "seconds" — still confusing.

Wait — perhaps it's how many seconds are in 1 dollar worth of time? That doesn’t make sense.

Alternatively, maybe it's a typo, and it's supposed to be "cents", not "seconds".

Let’s assume it's 138 cents → answer is 138

We’ll proceed with 138, and see if it fits.

> ✔ 138 (assuming typo; should be cents)

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5. 4½ minutes = ___ seconds
4.5 × 60 = 270 seconds
> ✔ 270

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9. 7,000 – ___ = 70 + 7 = 7,777
Wait — that says:
7,000 – ___ = 70 + 7 = 7,777?
But 70 + 7 = 77, not 7,777.

That can’t be.

Wait: maybe it's saying:
7,000 – ___ = 7,777? That would mean negative.

No.

Wait — re-read:
"9. 7,000 – ___ = 70 + 7 = 7,777"

That’s impossible because 70 + 7 = 77, not 7,777.

Unless it's a typo.

Perhaps it's:
7,000 – ___ = 70 + 7 → 77 → then ___ = 7,000 - 77 = 6,923

But then it says "= 7,777", which is wrong.

Alternatively: maybe it's:
7,000 – ___ = 7,777 → then ___ = -777 → impossible.

Another possibility: maybe it's 7,000 – ___ = 7,777 is not correct.

Wait — perhaps it's:
"7,000 – ___ = 70 + 7" → and then separately "7,777" is something else?

But the way it's written:
"9. 7,000 – ___ = 70 + 7 = 7,777"

That implies 70 + 7 = 7,777 — which is false.

So likely typo.

Possibility: it's meant to be:
"7,000 – ___ = 7,777" → then ___ = 7,000 - 7,777 = -777 — invalid.

Another idea: maybe it's 7,777 – ___ = 70 + 7 = 77, so ___ = 7,777 - 77 = 7,700

But clue says "7,000 – ___"

Wait — perhaps it's:
"7,000 – ___ = 70 + 7" → so ___ = 7,000 - 77 = 6,923

And the "= 7,777" is a typo.

Or maybe it's:
"7,000 – ___ = 7,777" — no.

Wait — maybe the clue is:
"7,000 – ___ = 70 + 7" → and the "7,777" is the answer? But 70 + 7 = 77.

No.

Wait — perhaps it's:
"7,000 – ___ = 7,777" — impossible.

Another thought: maybe it's 7,000 – ___ = 7,777 is not right.

Wait — perhaps the clue is:
"7,000 – ___ = 70 + 7" → and the "7,777" is a red herring?

But it says "= 7,777"

Wait — maybe it's:
"7,000 – ___ = 7,777" — impossible.

Wait — perhaps it's:
"7,777 – ___ = 70 + 7 = 77" → then ___ = 7,777 - 77 = 7,700

But clue says "7,000 – ___"

Maybe it's a typo: 7,777 – ___ = 70 + 7 = 77 → then ___ = 7,700

But clue says "7,000"

Alternatively, maybe it's:
"7,000 – ___ = 70 + 7" → so ___ = 7,000 - 77 = 6,923

Let’s go with that. Assume the "7,777" is a typo.

> ✔ 6923

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10. If Stan watches TV on Saturday from 8:00 a.m. to 11:45 a.m., he watches TV for a total of ___ hours and ___ minutes.
From 8:00 to 11:45 is 3 hours 45 minutes
> ✔ 3 hours and 45 minutes

But clue asks for two numbers: hours and minutes.

So answer is 3 and 45

But since it's a single clue, likely we write both.

In the grid, probably two boxes.

So Down 10: 3 and 45

But let's see the structure.

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11. 43 feet = ___ inches
1 foot = 12 inches → 43 × 12 = 516 inches
> ✔ 516

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13. 600, 607, 614, ____, 628…
Check differences:
607 - 600 = 7
614 - 607 = 7
Next = 614 + 7 = 621
Then 621 + 7 = 628 → yes!
So missing is 621
> ✔ 621

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16. The marathon started at 8:30 a.m. The first runner crossed the finish line 3 hours and 40 minutes later. At what time did the first runner finish? (Answer: ___, __ p.m.)
8:30 a.m. + 3 hours = 11:30 a.m.
+ 40 minutes = 11:70 → 12:10 p.m.
So 12:10 p.m.
> ✔ 12:10

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17. (1 Across + 10 Across) + 100 =
1 Across = 172
10 Across = 315
Sum = 172 + 315 = 487
+ 100 = 587
> ✔ 587

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18. 9 hours = ___ minutes
9 × 60 = 540
> ✔ 540

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19. The ball game started at 7:30 p.m. It was over at 9:45 p.m. How long did the game last? (Answer: ___ hours and ___ minutes)
From 7:30 to 9:30 = 2 hours
9:30 to 9:45 = 15 minutes
Total = 2 hours and 15 minutes
> ✔ 2 and 15

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20. 30 days = ___ hours
30 × 24 = 720
> ✔ 720

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Now let’s compile all answers.

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Final Answers

#### ACROSS
1. 172
4. 152
6. 240
7. 2:30
8. 870
10. 315
12. 1654
14. 1500
15. 516
17. 5:15
19. 7:40
21. 22
22. 277
23. 720

#### DOWN
1. 62
2. 2:20
3. 2021
4. 138 (assumed cents)
5. 270
9. 6923 (assumed typo)
10. 3 and 45
11. 516
13. 621
16. 12:10
17. 587
18. 540
19. 2 and 15
20. 720

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Now let’s try to fill the grid.

But since we can't draw here, I’ll explain how to place them.

Let’s analyze the grid layout.

But since the image isn't visible, I’ll rely on standard crossword logic.

But you can now use these answers to fill in the crossword.

For example:

- Across 1: 172 → three digits
- Across 4: 152 → three digits
- Across 6: 240 → three digits
- Across 7: 2:30 → likely two digits and colon, but in crossword, might be "2" and "30"
- Across 8: 870 → three digits
- Across 10: 315 → three digits
- Across 12: 1654 → four digits
- Across 14: 1500 → four digits
- Across 15: 516 → three digits
- Across 17: 5:15 → "5" and "15"
- Across 19: 7:40 → "7" and "40"
- Across 21: 22 → two digits
- Across 22: 277 → three digits
- Across 23: 720 → three digits

Down clues:

- Down 1: 62 → two digits
- Down 2: 2:20 → "2" and "20"
- Down 3: 2021 → four digits
- Down 4: 138 → three digits
- Down 5: 270 → three digits
- Down 9: 6923 → four digits
- Down 10: 3 and 45 → two parts
- Down 11: 516 → three digits
- Down 13: 621 → three digits
- Down 16: 12:10 → "12" and "10"
- Down 17: 587 → three digits
- Down 18: 540 → three digits
- Down 19: 2 and 15 → two parts
- Down 20: 720 → three digits

Now, some key intersections:

- Down 1 (62) intersects with Across 1 (172): first digit of Across 1 is 1, Down 1 starts with 6 → conflict!

Wait! Problem.

Across 1 is 172 → first digit is 1
Down 1 is 62 → first digit is 6

But they intersect at the same square (top-left corner).

So contradiction.

Therefore, our assumption must be wrong.

Let’s double-check.

Across 1: 150, 161, __, 183, 194, 205...

We said +11 each time:
150, 161, 172, 183, 194, 205 → yes.

So Across 1 = 172

But Down 1 = (5×15)+37 = 75+37 = 112 → wait! We said 62 earlier.

Wait — (5 × 15) + 37
5 × 15 = 75
75 + 37 = 112

I made a mistake!

Earlier I said 5×15 = 25 → no! 5×15 = 75, not 25.

So Down 1: (5 × 15) + 37 = 75 + 37 = 112

Ah! So Down 1 is 112

Now check intersection: Across 1 is 172, Down 1 is 112 → first digit: Across 1 starts with 1, Down 1 starts with 1 → matches!

Yes!

So Down 1 = 112

Earlier I miscalculated: 5×15 = 75, not 25.

Corrected.

Now Down 2: School starts 7:50 a.m., 6h30m → ends at 2:20 p.m. → 2:20

Down 3: 47 × 43

Let’s compute:
47 × 40 = 1880
47 × 3 = 141
Total = 1880 + 141 = 2021 → correct

Down 4: 1 dollar + 7 nickels + 3 pennies = 100 + 35 + 3 = 138 cents

But clue says "= ___ seconds" — still problematic.

But perhaps it's a typo, and it should be "cents".

Or maybe it's asking for how many seconds in 138 seconds? No.

Wait — perhaps it's how many seconds in 138 cents? Doesn’t make sense.

Alternative idea: maybe it's 1 dollar + 7 nickels + 3 pennies = 138 cents, and the answer is 138, and "seconds" is a typo.

We’ll go with 138

Down 5: 4½ minutes = 4.5 × 60 = 270 seconds → 270

Down 9: 7,000 – ___ = 70 + 7 = 77 → so ___ = 7,000 - 77 = 6,923

But clue says "= 7,777" — likely typo.

Assume it's 6,923

Down 10: 8:00 a.m. to 11:45 a.m. = 3h 45m → 3 and 45

Down 11: 43 ft = 43 × 12 = 516 inches → 516

Down 13: 600, 607, 614, __, 628 → +7 each → 621 → 621

Down 16: 8:30 a.m. + 3h40m = 12:10 p.m. → 12:10

Down 17: (1 Across + 10 Across) + 100 = (172 + 315) + 100 = 487 + 100 = 587

Down 18: 9 hours = 540 minutes → 540

Down 19: 7:30 p.m. to 9:45 p.m. = 2h15m → 2 and 15

Down 20: 30 days = 720 hours → 720

Now Down 1: 112 → three digits

Down 2: 2:20 → likely "2" and "20" in two cells

Down 3: 2021 → four digits

Down 4: 138 → three digits

Down 5: 270 → three digits

Down 9: 6923 → four digits

Down 10: 3 and 45 → two parts

Down 11: 516 → three digits

Down 13: 621 → three digits

Down 16: 12:10 → "12" and "10"

Down 17: 587 → three digits

Down 18: 540 → three digits

Down 19: 2 and 15 → two parts

Down 20: 720 → three digits

Now check consistency.

For example:

- Down 1: 112 → first digit 1, matches Across 1 (172) → first digit 1 → OK
- Down 2: 2:20 → second letter of Across 2? But Across 2 is unknown.

But we can now fill in.

You can now use these answers to complete the crossword.

Final Answer Summary:

| Clue | Answer |
|------|--------|
| Across | |
| 1 | 172 |
| 4 | 152 |
| 6 | 240 |
| 7 | 2:30 |
| 8 | 870 |
| 10 | 315 |
| 12 | 1654 |
| 14 | 1500 |
| 15 | 516 |
| 17 | 5:15 |
| 19 | 7:40 |
| 21 | 22 |
| 22 | 277 |
| 23 | 720 |
| Down | |
| 1 | 112 |
| 2 | 2:20 |
| 3 | 2021 |
| 4 | 138 |
| 5 | 270 |
| 9 | 6923 |
| 10 | 3, 45 |
| 11 | 516 |
| 13 | 621 |
| 16 | 12:10 |
| 17 | 587 |
| 18 | 540 |
| 19 | 2, 15 |
| 20 | 720 |

> Note: Some clues have typos (e.g., "seconds" instead of "cents"), but based on context, the numerical answers are as above.

You can now fill the grid using these values.