62
Chat with our AI personalities
131 all have odd numbers, so does 151 and 171. i would say 161 is the one that doesn't belong because it has an even number in it.
If you are multiplying by integers, only half of them. Odd times odd is odd. Odd times even is even. Here are the products of seven and the first 10 integers (1 thru 10): 7, 14, 21, 28, 35, 42, 49, 56, 63, 70 Every other number is odd and every other number is even, depending on where you start.
2 is a factor of every even number. Adding or subtracting one from an even number leaves an odd number. Since even and odd numbers alternate, 2 will be a factor of every other number.
The odd numbers between 160 and 180 are: 161, 163, 165, 167, 169, 171, 173, 175, 177, 179
There are infinitely many of them. The square of every odd number will be an odd square number.