The nearest number whose square ≤ 10000 is 100. Then the greatest odd number less that 100 is 99 so there are 50 odd numbers in the range 1- 99 inclusive whose squares are less than 10000.
200*50=10000
There are 20 odd numbers between 19 and 57
Their sum is 10000.
On the list of choices posted with the question, there is nothing that could be placed between two odd numbers.
The nearest number whose square ≤ 10000 is 100. Then the greatest odd number less that 100 is 99 so there are 50 odd numbers in the range 1- 99 inclusive whose squares are less than 10000.
37
The sum of the first 100 odd numbers (1 through 199) is 10000 (ten thou)
It is 100^2=10000
200*50=10000
Between the two numbers there are 49.
The odd numbers between 40 and 53 are 41,43,45,47,49,51.
There are 44 odd numbers between the two.
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.
There are 1499 odd numbers between 2000 and 4999
There are 69 odd numbers between 20 and 158.
There are 20 odd numbers between 19 and 57