If 9r + 143 . 3 - r3 .&nb

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 Multiple Choice QuestionsMultiple Choice Questions

21.

Find the value of  0.0007293 + 0.0083

  • 0.1

  • 0.5

  • 0.06

  • 0.8


22.

At what simple rate of interest a sum is double in 8 yr ?

  • 11.0%

  • 12.5%

  • 12%

  • 13.5%


23.

If ( a + b)  : ( b + c) : ( c + a) = 6 : 7 : 8 and a + b + c = 14, then the value of c is equal to

  • 6

  • 7

  • 8

  • 14


24.

If x - 1x = 12, then the value of 4x2 + 4x2 is

  • 7

  • 9

  •  - 7

  •  - 8


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25.

If 2a + 3b = 17 and 2a +2 - 3b + 1 = 5, then the value of a and b is

  • 6, 5

  • 3, 2

  • 8, 5

  • 7, 8


26.

The value of 1 - 121 - 131 - 14 ... 1 - 1n - 11 - 1n will be

  • nn + 1

  • 15n

  • 13n

  • 1n


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27.

If 9r + 143 . 3 - r3 . 3 - rr = m, then the value of m is 

  • 3

  • 32

  • 33

  • 3r


B.

32

m =  9r + 143 . 3 - r3 . 3 - rr= 324r +14 . 3 . 3 - r3 . 3 - rr = 34r + 1231r= 32r × 3123121r= 32rr = 32


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