Quick IQ question
What comes next in this number sequence?
This sequence looks simple, but the rule sits inside the gaps. That makes it a useful quick test of pattern thinking.
Quick answer
Answer: 63
The gaps are 6, 9, 12, and 15. The next gap is 18, so 45 + 18 = 63.
How to solve it
1
Find the gaps between numbers.
2
Notice the gaps go up by 3 each time.
3
Extend that rule one more step.
4
Add 18 to 45.
What this tests
Sequential reasoning
Mental arithmetic
Pattern extension
Rule consistency
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