exam Maths Puzzle Numerical Ability

strikeouts/innings = 3.6/9 = x/315

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exam Other Question

William is 1/6 as old as his faither but five years older than his sister, Mary. If the sum of all their ages is 51, how old is William? Simplify by combining like terms.

square root of 63 - 2 square root of 28 + 5 square root of 7