The quotient of 18 and 2 is 9 The sum of 22 and 9 is 31 31-9=22
The sum of the digits in 252 is 2 + 5 + 2 which equals 9.
9099 * * * * * The sum of the interior angles is (9 - 2)*180 = 1260 degrees.
The sum of the interior angles is (9-2)*180 = 7*180 = 1260 degrees.
20
2
2 and 9 2*9 = 18 2+9 = 11
29
4,5
product
2/5 + 2/4 = 9/10 9/10
( 5 - 2 )2 = 9