Factor Fury
Today's Challenge —
10 prompts. 30 seconds. Decide fast.
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Is the candidate a factor of the target? Press Yes or No (Y / N). Accuracy beats speed.
How to play & tips
Goal: Decide if the shown candidate divides the target evenly. You have 30 seconds for 10 prompts.
Tips: Test small primes first (2, 3, 5). For 3, use sum-of-digits; for 5, look at the last digit. For even checks, last bit/last digit tells you quickly. Don’t overthink near-misses—go with first valid rule.