Question

Dan found a two digit odd number. One of its digits was half the other. The number is greater than 50. What number did dan find

Answer 1

63 if you write down all the odd numbers first, (you know that the double-digit will be the tens as any doubled number will be even) and then double the other digit you would get 21 63 105 147 189 as it is a two digit number it can only be one of the first two and it has to be over 50 therefore 63