11
The numbers are 54 and 56.
420
100
110
The sum of 20 and 110 is 130.
60 + 50 = 110, 100 + 10 = 110, etc.
The sum of the first 10 even numbers is 110.
The numbers are 54 and 56.
It is 110.
420
110
100
One option is 110 and 70.
The sum of 20 and 110 is 130.
420
The fourth number is 10. The sum of the four numbers is: 12 + 50 + 48 + fourth_number = fourth_number + 110 Mean = sum_of_numbers / how_many_numbers → sum_of_numbers = mean × how_many_numbers = 30 × 4 = 120 But from above: sum = fourth_number + 110 = 120 → fourth_number = 120 - 110 = 10
The sum of the first 20 even numbers... is 110