exam Maths Puzzle Numerical Ability

If the sides of a square are decreased by 2 cm, the area is decreased by 36 cm2. What were the dimensions of the original square?

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exam Other Question

If you are dealt two cards successively (with replacement of the first) from a standard deck, find the probability of getting a heart on the first card and a diamond on the second? Need help soving this equation for X:

2x+bx=6c

Thank you