The numbers on the cards are numbered 2 through 10. Ace, Jack, Queen, and King do not have numbers. So add up 2 through 10 and get 54. There are 4 suits so 4 * 54 = 216.
Add the numbers then divide the sum by the number of numbers you added e.g. average of 1,2,3,4 four numbers add em up 1+2+3+4 =10 divide the sum by the number of numbers 10/4 average of 1,2,3,4 is 2.5
-10
24
-10
39.0625 = 10/4 * 10/4 * 10/4 * 10/4
-56
-144
The numbers on the cards are numbered 2 through 10. Ace, Jack, Queen, and King do not have numbers. So add up 2 through 10 and get 54. There are 4 suits so 4 * 54 = 216.
23
14
Four consecutive numbers adding up to ten are: 1+2+3+4
9 and 4 add up to give 13.
Add the numbers then divide the sum by the number of numbers you added e.g. average of 1,2,3,4 four numbers add em up 1+2+3+4 =10 divide the sum by the number of numbers 10/4 average of 1,2,3,4 is 2.5
-10
24
-10