book Maths Puzzle Numerical Ability

2 to the 3rd power (x squared yw) squared all over (2wx) to the 4th power times (? over ?) = x

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book Other Question

a jar contains 5-gran bolts and 10-gran bolts. the contents of the jar weigh 2.35 KG (1000 G = 1 KG). if there are 300 bolts altogether, how many are there of each kind? 6 (2x - 4) - 3 [2 - (3y + 4)]