Question

9=90,8=72,7=56,6=42,3=?

Answer 1

For this case, the first thing we must do is define a variable.

We have then:

x: unknown whole number

The pattern is given by an expression in the following way:

$x (x + 1)$

Therefore, we have:

For x = 9:

$9 (9 + 1) = 9 (10) = 90$

For x = 8:

$8 (8 + 1) = 8 (9) = 72$

For x = 7:

$7 (7 + 1) = 7 (8) = 56$

For x = 6:

$6 (6 + 1) = 6 (7) = 42$

Therefore, if we continue the pattern, for x = 3 we have:

For x = 3:

$3 (3 + 1) = 3 (4) = 12$

Answer:

9 = 90, 8 = 72, 7 = 56, 6 = 42, 3 = 12

Answer 2

9 = 90 (means 10 has been multiplied by 9)
8 = 72 ( means 9 has been multiplied with 8)
7 = 56 ( means 8 has been multiplied with 7)
6 = 42 ( means 7 has been multiplied with 6)
Then
3 = 12 ( means 4 has been multiplied with 3)
I hope that from the above deductions you have come to know the relation. I hope the answer has come to your help.