Brain Teasers
Two-Digit Number
I am a two-digit number. The sum of my digits is 11. I am divisible by both 4 and 7. What number am I?
Answer
56Hide Answer Show Answer
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wow....
Very, very easy. But still good fun.
I am not sure how you are *supposed* to go about solving this... I just 4*7 (28 which does NOT equal 11) then multiplied that by 2 to get 56.... figured it anyways ;)
too easy, 7 being a prime number means that it has to be a multiple of 7 x 4 (2 and there are only 3 options with 2 digits
not meant to be btw, meant to be 8 ) without the space
4 * 7 fully factored is 2 * 2 * 7. To arrive at an acceptable answer, one need only test numbers which add additional factors of 2 or 7.
Also note- the sum being 11, possibilities are limited to the set, {29, 38, 47, 56, 65, 74, 83, 92}.
Also note- the sum being 11, possibilities are limited to the set, {29, 38, 47, 56, 65, 74, 83, 92}.
Fun & easy.
Fun, challenging and entertaining teaser. It took a few minutes before I got it.
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