How many times does 4 go into 50

One integer is 8 times another. if the product is 72, then find the integers

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.

What is the lcm of 16 and 40 ? 24 and 40 ?