1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19 + 21 + 23 + 25 + 27 + 29 + 31 + 33 + 35 + 37 + 39 = 400
1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39
above are the first 20 odds
If you add the first to the last you get 40
If you add the second to the second from last you get 40
It doesn't matter which numbers you add first so long as you add them all up
there are 10 pairs of numbers totaling 40 so the sum is 400
That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.
If the sum of two numbers is even, the two numbers are either both even or both odd. A few examples:2 + 4 = 6 (even + even = even)2 + 3 = 5 (even + odd = odd)5 + 2 = 7 (odd + even = odd)7+13 = 20 (odd + odd = even)
It is 155 greater.
20 of them.
The sum of the first N square numbers is: N*(N+1)*(2N+1)/6 So putting N = 20 gives 2870.
The answer is 20*20 = 400
That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.That can't be solved. The sum of five odd numbers will always be an odd number.
The odd numbers between 14 and 20 are 15, 17, and 19. To find their sum, you add them together: 15 + 17 + 19 = 51. Therefore, the sum of the odd numbers between 14 and 20 is 51.
The first 20 odd numbers are: 13579111315171921232527293133353739.
25
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.
It is 75.
9 and 11
The sum of the five odd numbers between 10 and 20 is: sum = 5 x (11 + 19) / 2 = 75.
Reference: cprogramming-bd.com/c_page4.aspx#ODD%20 Numbers
Unless you mean at least 20 chickens and/or *within* 7 days, it is impossible, as an odd number of odd numbers will always have an odd number as their sum.
If the sum of two numbers is even, the two numbers are either both even or both odd. A few examples:2 + 4 = 6 (even + even = even)2 + 3 = 5 (even + odd = odd)5 + 2 = 7 (odd + even = odd)7+13 = 20 (odd + odd = even)