1.

Among three numbers, the first is twice the second and thrice the third. If the average of three numbers is 198, then what is the difference between the first and the third number?1). 2162). 2973). 6614). 431

Answer»

LET first number = 2x

Second number = x

Third number = 2x/3

Average of three number is 198

(x + 2x + 2x/3)/3 = 198

11x = 1782

x = 162

First number = 2 × 162 = 324

Third number = 324/3 = 108

Difference between first and third number = 324 – 108 = 216


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