exam Maths Puzzle Numerical Ability

Roots other than square root is called?

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exam Other Question

how could you use a calculator with only +, -, x, and division keys to check these claims about values of expressions involving fractional exponents?

a- 225 1/2 =15

b- 7 1/2 4a+6(2a-3)-(a+6)=5(a+7)-19