Is the number a multiple, or not? Answer fast to build a streak. Sixty seconds on the clock.
Recognising multiples backwards ("is 51 in the 7 times table?") is a different skill from reciting tables forwards, and it is the one division, fractions, and factor questions actually use. The near-misses in this game (49, 50, 51...) are chosen to force real checking, not pattern-spotting.