32
The sum of all odd numbers from 1 to 64 inclusive is 4,096
The two-digit whole numbers that have no odd factors except 1 are the powers of 2, as these numbers are only divisible by 1 and themselves. The two-digit powers of 2 are 16, 32, 64, and 128. However, 128 is not a two-digit number, so we only consider 16, 32, and 64. Therefore, there are three two-digit whole numbers that meet the criteria: 16, 32, and 64.
25.
37
201
The sum of all odd numbers from 1 to 64 inclusive is 4,096
There are 7 odd numbers between 50 and 64. To find this, we first identify the odd numbers in the range, which are 51, 53, 55, 57, 59, 61, and 63. We can calculate the count by subtracting the first odd number (51) from the last odd number (63) and then adding 1 (63-51+1=13+1=7).
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.
The two-digit whole numbers that have no odd factors except 1 are the powers of 2, as these numbers are only divisible by 1 and themselves. The two-digit powers of 2 are 16, 32, 64, and 128. However, 128 is not a two-digit number, so we only consider 16, 32, and 64. Therefore, there are three two-digit whole numbers that meet the criteria: 16, 32, and 64.
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..
25
37
201
71