My teacher is making us do check your understandings in math nation but I have no clue how to do any of it. it is section 10 topics 1, 2, 3, and 5. please help

Can someone me out here and the tell me the greatest common factor

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.