Lowest common multiple of 28 and 42

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.