exam Maths Puzzle Numerical Ability

Beth had 4,000 in her purse on tuesday. On Wednesday after making a deposit, she onle had 2,500, a decrease of 1,500. What was the percentage change from Tuesday to Wednesday?

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exam Other Question

7/2x+1/2x=3x+3/2+5/2x Problem is:

x - x^2/3 = x^1/3 (??) Fill in the ??. The object is to find the equation that when multiplied by x^1/3 would give the result of x - x^2/3.

I know this has to be something simple, but my brain is fried.