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Maths Puzzle
Sarah let James borrow her 80 crayons for art class, but when he returned them there were only 73 crayons in the box. How many of Sarah’s crayons are missing?
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If the product of two positive integers that are not relatively prime is 507, what is the sum of the two numbers?
Three rotating gears
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Three gears A, B, and C rotate with each other. There are 24 cogs on gear A, 36 cogs on gear B, and 300 cogs on gear C. What is the minimum number of times gear B needs to rotate before the cogs on all gears are back in their initial configuration?