Problems based on Numbers Test 5

Question : 40 of 40

Marks: +1, -0

2 1 /2

is added to a number and the sum multiplied by

4 1 /2

and 3 is added to the product and dividing the sum by

1 1/ 5

, the quotient becomes 25. The number is:

Solution:

Let the number be x; then

{9/2(x+5/2)+3}/{6\/5}=25

⇒9/2({2x+5}/2)+3=30

⇒9/2({2x+5}/2) =27

⇒2x+5={27×4}/9

⇒2x=12-5

⇒x=7/2=3 1/2

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