book Maths Puzzle Numerical Ability

7. The sum of two numbers is 17 and the sum of their square is 145. Find the larger number.
a. 10 b. 11 c. 8 d. 9 e. none
The answer is D, but how? Please help me prepare for my

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book Other Question
Write problem in terms of simpler logarithmic forms


log b v^7/ u^8 what is the ratio of the area of a square that circumscribes a circle to the area of a square that inscribes the same circle?