Question

Write Down 3 numbers where the following are true:the total of the three numbers is 20.The product of the three numbers is 90

Answer 1

1, 9 and 10.

Explanation:

Let the 3 numbers be x, y and z, then

x + y + z = 20

xyz = 90

Assuming the numbers are whole numbers lets find the prime factors of 90:

90 = 2*3*3*5

So we need to combine these factors to fit the 2 eqautions.

Now 90 = 9 * 10

= 1 * 9 * 10

If we include 1 as one of the 3 numbers then 1, 9 and 10 will fit the bill.

Answer 1, 9 and 10