There are 25 of them.
Square numbers 16, 25, 36, 49, 64, 81, 100
They are: 19 21 23 and 25
101
There are not THAT many odd numbers between 20 and 25. If you include the extremes, you have 21, 23, and 25. Try each one of them, and see which is a multiple of 3.
There are 25 of them.
odd numbers between 25 and 45 inclusive are 25 27 29 31 33 35 37 39 41 43 45
25
The sum of all odd numbers, up to the odd number (2n-1) is n^2. So the sum of the first 1000 or 10^3 odd positive numbers is (10^3)^2=10^6 Now divide by 10^3 or 1000 since we have 1000 numbers so we have 10^6/10^3=1000 The mean of the first 1000 positive odd numbers is 1000 If you ask the mean of the odd numbers between, 1 and 1000, that is another problem, since there are 500 of them, the answer would be 500^2/500=500 Think of the mean of the odd numbers between 1 and 10, there are 5 of them and there sum is 25 so the mean is 25/5 or 5 **** in general, the arithmetic mean of the first n odd numbers is n^2/n or n. So that is why the number is 1000.
These two odd numbers are 39 and 65. Both are between 25 and 75, and their GCF is 13.
These numbers between 1 and 40 have an odd number of factors: 4, 9, 16, 25, 36.
Square numbers 16, 25, 36, 49, 64, 81, 100
23, 25, 27, 29
They are: 19 21 23 and 25
101
26
There are not THAT many odd numbers between 20 and 25. If you include the extremes, you have 21, 23, and 25. Try each one of them, and see which is a multiple of 3.