exam Maths Puzzle Numerical Ability

In a survey of 150 adults, 66% said they have a savings account, 36% said they owe money on a loan, and 8% said that they neither save nor owe money. How many of the respondents have both a savings account and a loan?

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exam Other Question

What are the steps to solving this kind of problem? I can solve problems other ways like using FOIL and problems with a formula for two multiplied things, but when there are three to multiply, I have no idea. Please help me!

(13y-5)(2y+4)(y+2) The area of a rectangle is 84 square inches. Its length and width are both whole numbers.

What is the minimun perimeter of the rectangle?

What is the maxium perimeter of the rectangle?

Help please. Not in book.