If the seven-digit number 49x29y6 is divisible by 72, what will be the value of (x + 2y) for the largest possible values of x and y?

If the 7-digit number x42132y is divisible by 44, where y ≠ 0 and y ≠ 4, then what is the value of (y – x)?

A given whole number is doubled and 9 is added to it. If the resulting number is tripled, it becomes 171. If 3 is subtracted from the original whole number, the result will be divisible by: