There are 48/2 + 1 = 25 odd numbers in 1 to 49, inclusive.
49 is an odd number. All numbers ending in 1, 3, 5, 7, or 9 are odd numbers.
135791113151719212325272931333537394143454749.
1 + 3 + 5 + ... + 49 = ((49 + 1)/2)2 = 625
The sum of 5 odd numbers must be odd and 100 is even. So there cannot be such a set.
26
It is not possible for five odd numbers to add up to 50 or any even number.
There are 15 prime numbers between 1 and 49
There are 50 odd numbers in the range from 1 to 99. This can be calculated by dividing the total range (99 - 1 + 1 = 99) by 2, as every other number in the range is odd. Therefore, 99 / 2 = 49.5, but since we are dealing with whole numbers, there are 50 odd numbers in the range from 1 to 99.
They are: 1+3+5+7+9+11+13 = 49
Three: 1 7 49.
Three: 1 7 49.
All the numbers above 2 that are the squares of odd primes have exactly 3 factors: 1, the odd prime, and the odd prime squared. 4, 9, 25, 49, 81, 121,...