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Question

Of the four numbers, whose average is 24.75, the first number is twice the second, second number is one-third the third number and the third number is 5 times the fourth number. Find the smallest of these numbers.

A
9
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B
15
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C
30
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D
10
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Solution

The correct option is A 9
Let the 4 numbers be a, b, c and d
a:b:c:d=2:1:3:0.6=10:5:15:3
So, the smallest number here is 3x
10x+15x+5x+3x=33x=4×24.75=99x=3
Smallest number, d=3×3=9

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