Of three numbers, the third is four times the second and the second is two times the first. If their average is 165, the second number of the three numbers is:	Choices.
A) 18 B) 100 C) 90 D) 45 E) 120
Explanation:   Let first number be x.   So,2nd no. = 2x &amp; 3rd no.=8x.   So,x+2x+8x=165 × 3 = 495   11x = 495/11   x = 495/11   Hence,first Number is x=45   so, second number is = 2 x 45=90   Answer: 90
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Of three numbers, the third is four times the second and the second is two times the first. If their average is 165, the second number of the three numbers is: