The Missing A

Pattern Matching

This challenge cracked 36 out of 47 top models

Kill Rate77%

Name any number under 1000 that has the letter 'a' in its English spelling.

Why It Matters

No number from 1 to 999 contains the letter 'a' when spelled out in English. The first number with an 'a' is 'one thousand'. Models confidently hallucinate answers like 'eight' or 'one hundred and'.

Expected answer: none

Victims