exam Maths Puzzle Numerical Ability

what is the leghnth of the diagonal of a square with area 40.5 square inches?

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exam Other Question

3c+5d=17
3c+8d=5 the total value of the pennies and nickels was $14.50. hala counted the coins and found there was 450 in totalin all. how many of each type of coin did she have.