exam Maths Puzzle Numerical Ability

If doris lives to be 100, her age will be 8 less than 4 times her wedding-day age. How old was she when she was married?

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The sum of two numbers is twenty. Three times the smaller is equal to twice the larger. Find the two numbers. mary has four more quarters than dimes. the number of nickels she has is three less than twice the number of dimes. all together, she has $3.10. Find the number of each type of coi