Letter sequence IQ test
What letter comes next?
A quick alphabet-pattern puzzle for testing sequence reasoning without doing math.
Quick answer
Answer: U
The alphabet positions are 1, 3, 6, 10, and 15. The gaps are 2, 3, 4, and 5, so the next gap is 6. O plus 6 letters gives U.
How to solve it
1
Convert letters to alphabet positions.
2
Write the gaps between positions.
3
Notice the gaps increase by one.
4
Add the next gap to the final letter.
What this tests
Alphabet mapping
Pattern extension
Working memory
Rule consistency
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IQFlow combines number, letter, memory, and reasoning tasks so one puzzle becomes part of a broader profile.