Let’s solve each number pattern step by step.
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Problem 1:
Pattern:
104, 113, 122, 131, 140 ...
Look at how much each number increases:
- 113 - 104 =
+9
- 122 - 113 =
+9
- 131 - 122 =
+9
- 140 - 131 =
+9
So the rule is:
Add 9 each time.
Next three numbers:
- 140 + 9 =
149
- 149 + 9 =
158
- 158 + 9 =
167
✔ Answer for #1:
149, 158, 167
How do you know? Because every number goes up by 9 — it’s a steady increase.
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Problem 2:
Pattern:
331, 316, 301, 286, 271 ...
Check the difference between numbers:
- 316 - 331 =
-15
- 301 - 316 =
-15
- 286 - 301 =
-15
- 271 - 286 =
-15
Rule:
Subtract 15 each time.
Next three numbers:
- 271 - 15 =
256
- 256 - 15 =
241
- 241 - 15 =
226
✔ Answer for #2:
256, 241, 226
How do you know? Each number drops by 15 — consistent decrease.
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Problem 3:
Pattern:
890, 780, 670, 560, 450 ...
Find the difference:
- 780 - 890 =
-110
- 670 - 780 =
-110
- 560 - 670 =
-110
- 450 - 560 =
-110
Rule:
Subtract 110 each time.
Next three numbers:
- 450 - 110 =
340
- 340 - 110 =
230
- 230 - 110 =
120
✔ Answer for #3:
340, 230, 120
How do you know? Every number goes down by exactly 110 — same amount each time.
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Final Answer:
1. 149, 158, 167
2. 256, 241, 226
3. 340, 230, 120
Parent Tip: Review the logic above to help your child master the concept of number patterns worksheet grade 3.
