Robin had two hundred fifty-four pennies. She wanted to place the pennies into thirty-one stacks, with the same amount in each stack. How many more pennies would she need so all the stacks would be equal?

Suppose you are choosing a 6-digit personal access code. this code is made up of 4 digits chosen from 1 to 9, followed by 2 letters chosen from a to z. any of these digits or letters can be repeated. find the total number of personal access codes that can be formed. 492,804 341,172 39,917,124 4,435,236