book Maths Puzzle Numerical Ability

Consecutive integers.
I need to find three consecutive integers such that the sum of their squares is 77.

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book Other Question

an initial investment is made of $2000. part at 7% and the rest at 8%. If the total yearly interest from both equals $154 how much was invested at each rate? This is the question: There are bolts and nuts in a box. The number of bolts are 55 times as many as nuts. If 18 more nuts are put in the box, there will be only 40 times as many b