Number patterns online exercise for Grade 1 - Free Printable

Let's solve the Number Patterns worksheet step by step.

---

🔹 Part 1: Fill in the missing numbers in the grids

We have four rows of boxes with some numbers filled in. We need to identify the pattern and fill in the blanks.

---

#### Row 1:
```
[1] [ ] [ ] [4] [5] [ ] [ ] [8]
```

Look at the known numbers:
- 1, then 4 (3 steps ahead), then 5, then 8.

Let’s check if it's increasing by 1 each time:

- 1 → 2 → 3 → 4 → 5 → 6 → 7 → 8

So this is just counting up by 1.

Fill in:
- 1, 2, 3, 4, 5, 6, 7, 8

✔ Answer: 2, 3, 6, 7

---

#### Row 2:
```
[34] [ ] [ ] [37] [38] [ ] [40] [ ]
```

Known: 34, 37, 38, 40

From 34 to 37 = +3 → so maybe increasing by 1?

Wait: 34 → ? → ? → 37 → 38 → ? → 40 → ?

But 34 to 37 is a jump of 3 over two boxes — so likely incrementing by 1.

Try counting:
- 34, 35, 36, 37, 38, 39, 40, 41

Yes! It's consecutive integers.

So:
- 34, 35, 36, 37, 38, 39, 40, 41

✔ Answer: 35, 36, 39, 41

---

#### Row 3:
```
[ ] [4] [6] [ ] [10] [ ] [14] [ ]
```

Known: 4, 6, 10, 14

Check differences:
- 4 to 6 = +2
- 6 to ? → ?
- ? to 10 → ?
- 10 to ? → ?
- ? to 14 → ?

But we also have positions:
Position: 2:4, 3:6, 5:10, 7:14

Let’s list positions:
- Pos 1: ?
- Pos 2: 4
- Pos 3: 6
- Pos 4: ?
- Pos 5: 10
- Pos 6: ?
- Pos 7: 14
- Pos 8: ?

Now look at the values at even positions? Or odd?

Try to see pattern between knowns:

From 4 to 6 = +2
Then from 6 to 10 = +4
Then from 10 to 14 = +4? No, that would be +4, but we’re skipping one box.

Wait — positions:

- Pos 2: 4
- Pos 3: 6 → +2
- Pos 5: 10 → from pos 3 to 5: +4 → so maybe increasing by 2 every step?

Wait — maybe it's increasing by 2 starting from 2?

Try filling in:

Assume the sequence increases by 2 each time:
Pos 1: ?
Pos 2: 4
Pos 3: 6
Pos 4: 8
Pos 5: 10
Pos 6: 12
Pos 7: 14
Pos 8: 16

That fits!

So:
- [2], [4], [6], [8], [10], [12], [14], [16]

✔ Answer: 2, 8, 12, 16

---

#### Row 4:
```
[5] [10] [ ] [ ] [25] [ ] [35] [ ]
```

Known: 5, 10, 25, 35

Check differences:
- 5 to 10 = +5
- 10 to ? → ?
- ? to ? → ?
- ? to 25 → ?
- 25 to ? → ?
- ? to 35 → ?

Possibility: multiples of 5?

5, 10, 15, 20, 25, 30, 35, 40

Yes! That fits.

So:
- 5, 10, 15, 20, 25, 30, 35, 40

✔ Answer: 15, 20, 30, 40

---

🔹 Part 2: Number Pattern Sequences

Now solve the numbered sequences.

---

#### 1. 19, 18, ____, 16, 15, ____, ____

Looking at the numbers: decreasing.

19 → 18 → ? → 16 → 15 → ? → ?

So it’s decreasing by 1 each time.

So:
- 19, 18, 17, 16, 15, 14, 13

✔ Answer: 17, 14, 13

---

#### 2. 2, 4, ____, ____, 10, 12, ____

Increasing by 2?

2, 4 → +2 → next should be 6, 8, 10, 12, 14

So:
- 2, 4, 6, 8, 10, 12, 14

✔ Answer: 6, 8, 14

---

#### 3. 10, ____, 30, ____, 50, ____, 70

Looks like increasing by 10s?

10, ?, 30, ?, 50, ?, 70

So:
- 10, 20, 30, 40, 50, 60, 70

✔ Answer: 20, 40, 60

---

#### 4. ____, 29, 28, ____, 26, ____, 24

Decreasing by 1?

29 → 28 → ? → 26 → ? → 24

So:
- 29 → 28 → 27 → 26 → 25 → 24

But first number before 29?

So: ? → 29 → 28 → 27 → 26 → 25 → 24

So previous number is 30

Thus:
- 30, 29, 28, 27, 26, 25, 24

✔ Answer: 30, 27, 25

---

#### 5. 88, 89, ____, ____, ____, 93

Increasing by 1?

88 → 89 → 90 → 91 → 92 → 93

So:
- 88, 89, 90, 91, 92, 93

✔ Answer: 90, 91, 92

---

#### 6. 15, ____, 25, 30, ____, ____

15 → ? → 25 → 30 → ? → ?

From 15 to 25 = +10, but only one step in between → so likely increasing by 5?

15 → 20 → 25 → 30 → 35 → 40

Yes!

So:
- 15, 20, 25, 30, 35, 40

✔ Answer: 20, 35, 40

---

✔ Final Answers Summary:

---

#### Grids:

1. 2, 3, 6, 7
2. 35, 36, 39, 41
3. 2, 8, 12, 16
4. 15, 20, 30, 40

---

#### Sequences:

1. 17, 14, 13
2. 6, 8, 14
3. 20, 40, 60
4. 30, 27, 25
5. 90, 91, 92
6. 20, 35, 40

---

Let me know if you'd like this formatted for printing or as a completed worksheet!