Put none in the first room, then 1 in the second, 2 in the third, 3 in the fourth... and so on until there are 8 in the ninth room. Room boys total # 0 ...... 0 # 1 ...... 1 # 2 ...... 3 # 3 ...... 6 # 4 .... 10 # 5 .... 15 # 6 .... 21 # 7 .... 28 # 8 .... 36
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Yes I can.
345 is an odd number. This is because odd numbers don't divide by 2 exactly, but even numbers do divide by 2 exactly. 345 divided by 2 is 172.5 which is not a whole number. Therefore 345 is an odd number.
3 and 9.
The sum of an odd number of odd numbers is an odd number. 9 odd parts can't add up to 60.
Because you can divide it by 2 without remainder.