Brain Teasers
9 = 4
Complete the series. 9 = 4, 21 = 9, 22 = 9, 24 = 10, 8 = 5, 7 = 5, 99 = 10, 100 = 10, 16 = ?, 17 = ?
Hint
Count carefully.Answer
16 = 7 and 17 = 9. The number of letters in the spelling of 16 (sixteen) is 7 and that of 17 (seventeen) is 9.Hide Hint Show Hint Hide Answer Show Answer
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Comments
also known as "4 is cosmic" - start with any number and go to the 'next' ie: 100 -> 10 -> 3 -> 5 -> 4 and you will always always end at 4.
Good one.
I don't get it.
the rule of 4 means you can start at any number and if you count characters down you will always end up at 4.
100 = One hundred = 10 = Ten = 3 = three = 5 = five = 4
100 = One hundred = 10 = Ten = 3 = three = 5 = five = 4
Best logic one I ever saw
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