All those not less than 20.
The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
The first 20 odd numbers are: 13579111315171921232527293133353739.
Seven of them.
It is impossible to add eight odd numbers together to get an even sum like 20. The sum of any odd numbers is always odd if an odd count of them is used, and it becomes even only when an even count is used. Since eight is an even number, the sum of eight odd numbers would be even, but it will still exceed 20 since the smallest odd number is 1, and the sum of eight 1s is 8, which is less than 20. Thus, there are zero ways to add eight odd numbers to achieve a sum of 20.
25
First odd number greater than 20 is 21 Last odd number less than 200 is 199 → number of odd numbers between 20 and 200 is (199 - 21) ÷ 2 + 1 = 90
'5' & '15' are odd numbers less than 20 , and are also multiples of '5'.
9 and 15 are the only two odd composite numbers less than twenty.
The odd prime numbers less than 20 are 3, 5, 7, 11, 13, 17, and 19.
The first 20 odd numbers are: 13579111315171921232527293133353739.
15 and 9 are both odd, composite numbers less than 20.
Seven of them.
There are 20 odd numbers in 40.
9 and 15
There are 69 odd numbers between 20 and 158.
There are 40 odd numbers between 20 and 100. Remember that an odd number is every second number. There are 80 numbers between 20 and 100, so there are 40 odd numbers and 40 even numbers.
how many odd numbers is there between 20 and 158