using 9 odd numbers the total should be 90
((3*3*15/3)+21/7)*3 + 55 -1
How about 9 odd numbers, all of which are the number 9!
(9 + 9 + 9) - (9 + 9 + 9) + 9 * 9 + 9 = 90
To find nine odd numbers that add up to 90, we can approach this problem in a systematic way.
Let's start by setting up the equation. Since we need to find the sum of nine odd numbers, we can represent each odd number as 2n + 1, where n is a non-negative integer.
So, the equation becomes:
(2n1 + 1) + (2n2 + 1) + (2n3 + 1) + (2n4 + 1) + (2n5 + 1) + (2n6 + 1) + (2n7 + 1) + (2n8 + 1) + (2n9 + 1) = 90
Now, simplify the equation:
2(n1 + n2 + n3 + n4 + n5 + n6 + n7 + n8 + n9) + 9 = 90
Removing the constant term on the right side:
2(n1 + n2 + n3 + n4 + n5 + n6 + n7 + n8 + n9) = 90 - 9
2(n1 + n2 + n3 + n4 + n5 + n6 + n7 + n8 + n9) = 81
Next, divide both sides of the equation by 2:
n1 + n2 + n3 + n4 + n5 + n6 + n7 + n8 + n9 = 81/2
n1 + n2 + n3 + n4 + n5 + n6 + n7 + n8 + n9 = 40.5
Since the sum of nine integers cannot be a decimal, it is not possible to find nine odd numbers that add up to exactly 90.