Sum of a fraction and thrice of its reciprocal is  What

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 Multiple Choice QuestionsMultiple Choice Questions

21.

The numerator of a fraction is 4 less than its denominator. If the numerator is decreased by 2 and the denominator is increased by 1, then the denominator becomes eight times the numerator. Find the fraction.

  • 3 over 7

  • 4 over 8

  • 2 over 7

  • 3 over 8

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22.

If the number p is 5 more than q and the sum of the squares of p and q is 55, then the product of p and q is

  • 10

  • -10

  • 15

  • -15

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23.

The sum of the four number is 48. When 5  and 1 are added to the first two and 3 and 7 are subtracted from the 3rd and 4th, the numbers will be equal. The numbers are

  • 6, 10, 14, 18

  • 5, 11, 13, 19

  • 9, 7, 15, 17

  • 4, 12, 12, 20


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24.

Sum of a fraction and thrice of its reciprocal is 73 over 20. What is the fraction?

  • 4 over 5

  • 9 over 4

  • 4 over 9

  • 5 over 4


D.

5 over 4

Let the number be x.
According to the question,
    straight x space plus space 3 over straight x space equals space 73 over 20
rightwards double arrow space space space fraction numerator straight x squared space plus space 3 over denominator straight x end fraction space equals space 73 over 20
rightwards double arrow space space space 20 straight x squared space plus space 60 space equals space 73 straight x
rightwards double arrow space space space 20 straight x squared space minus space 73 straight x space plus space 60 space equals space 0
rightwards double arrow space space space 4 straight x left parenthesis 5 straight x space minus 12 right parenthesis space minus space 5 left parenthesis 5 straight x minus 12 right parenthesis space equals space 0
rightwards double arrow space space space space left parenthesis 4 straight x minus 5 right parenthesis thin space left parenthesis 5 straight x minus 12 right parenthesis space equals space 0
rightwards double arrow space space space space space space straight x space equals space 5 over 4


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25.

6 times a fraction is greater than 7 times its reciprocal by 11. What is the fraction?

  • 5 over 3

  • 7 over 3

  • 5 over 4

  • 4 over 5


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