The average of a non zero number and its square is 5 times the number. The number is Choose the correct choice from the following answers:
A) 9  B) 17  C) 29  D) 295  E) None
Sol.   Let the number be x. Then,   x + x2 / 2 = 5x   ‹=› x2 – 9x = 0   ‹=› x (x - 9) = 0   ‹=› x = 0 or x = 9.   So, the number is 9.   9nswer 9
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The average of a non zero number and its square is 5 times the number. The number is