The answer is going to be 3.5 more than 52.5 so the answer is 56.
420, 210, 140, 105, 84, 70, 60, 42, 35, 30, 28, 21, 20, 15, 14, 12, 10, 7, 6, 5, 4, 3, 2, 1
The answer is 169 ..... I hope this helps :)
Yes, because there are common factors in the equation. therefore showing you can group