Of three numbers, the third is twice the second and the second is 4 times the first. If their average is 78, the smallest of the three numbers is:	Choose the correct choice from the following answers:  A) 18  B) 19  C) 20  D) 21  E) 22
Explanation:   Let first number be x.   So,2nd no. = 4x &amp; 3rd no.=8x.   So,x+4x+8x=78 × 3 = 234.   13x = 234   x = 234/13   Hence,smallest Number x=18.   18nswer: 18
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Of three numbers, the third is twice the second and the second is 4 times the first. If their average is 78, the smallest of the three numbers is: