The sum of all odd numbers from 1 to 64 inclusive is 4,096
26
There are 48/2 + 1 = 25 odd numbers in 1 to 49, inclusive.
27 and 81 are the odd numbers. Since odd numbers are 1, 3, 5, 7 and 9, look at the last number and you will be able to tell if it's odd or even.
Thirteen.
16 has an odd number of factors; its factors are 1, 2, 4, 8, and 16
odd multiples of 7 are odd numbers.. like 7*1, 7*3,7*5..
201
Infinity
71
250 of them.
37