25
51
61
They are: 17 19 and 23
The ratio is simply 24/15. That fraction (or ratio) can be simplified by dividing both numbers by their highest common factor.
Must be the 2 odd numbers, 9 & 15 (P = 135, S = 24)
12 numbers -1-3-5-7-9-11-13-15-17-19-21-23
Count how many of the numbers are odd. If an odd number of them are odd, then their sum is odd. If an even number of them are odd, then their sum is even.
Never. When you dont add the same odd number and even number of times. For example: 5 + 3 (2 odd numbers; and even amount of odd numbers ) = 8 5 + 3 + 7 = 15 an odd amount of odd numbers 5 + 3 + 7 + 9 = 24 another even amount of odd numbers. But never if you use the only same number
11+13 is 24. If you believe 9, 15 are between 9 and 15 (I don't) it would be 48
The answer would be 120... You are increasing by odd numbers 8, 15 (difference is 7) 24 (difference of 9) 35 (difference of 11) 48 (difference of 13) 63 (difference of 15).... etc.... increasing the terms by odd numbers 7 , 9, 11, 13, 15, 17, 19, 21.. I hope this helps
25
25 if you count 1, 24 if you don't.
Go through each of the numbers, and count how many of them are odd. If you count an odd number of them, then their sum is odd. If you count an even number of them, then their sum is even.
They are 24 and 15 which are composite numbers
24
24