exam Maths Puzzle Numerical Ability

I need help learning fractions and geting them stuck in my memory. I have flunked more than 5 math tests because I forget the meterial.

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exam Other Question

Three times the larger numbers is equal to four times the smaller. The sum of the numbers is 21. Find the numbers. 1. (Age) a father is now three times as old as his son. Twelve years ago he was six times as old as his son. Find the present age of each.