Multiple choice general knowledge math & puzzles

Complete the series. 9 = 4, 21 = 9, 22 = 9, 24 = 10, 8 = 5, 7 = 5, 99 = 10, 100 = 7, 16 = ?, 17 = ?

  1. 8

  2. 9

  3. 4

  4. 3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The logic is the number of letters in the English word for each number: Nine(4), Twenty-one(9), Twenty-two(9), Twenty-four(10), Eight(5), Seven(5), Ninety-nine(10), One hundred(10). For 16 (Sixteen), there are 7 letters. For 17 (Seventeen), there are 9 letters. The stored answer 9 refers to Seventeen.

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