book Maths Puzzle Numerical Ability

What is the square root of 24 minus the square root of 96?

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book Other Question

1/9 of the people in a stadium are men. 3/8 of the remainder are women and the rest are children. There are 400 more children than women. How many people are there in the stadium altogether? In a right triangle, one acute angle is 54degree more than twice the other. Find each acute angle.