Fractions
 The H.C.F. of 0.54, 1.8 and 7.2 is ?

 1.8
 0.18
 .018
 18

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H.C.F. = (H.C.F. of Numerators) / ( L.C.M. of Denominators)
Correct Option: B
The given number are 0.54,1.80 and 7.20
So given number can be represented as fraction 54/100, 180/100 and 720/100
H.C.F. of 54, 180 and 720 is 18
∴ H.C.F. of given number= 18 / 100
= 0.18
 which of the following fraction are in ascending order ?

 16/19, 11/14, 17/22
 11/14, 16/19, 17/22
 17/22, 11/14, 16/19
 16/19, 17/22, 11/14

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16/19 =0.842,
11/14 =0.785 and
17/22 = 0.772Correct Option: C
16/19 =0.842,
11/14 =0.785 and
17/22 = 0.772
∴ 0.772 < 0.785 < 0.842
or 17/22 < 11/14 < 16/19.
 Exp. = (.35 x .0015) / (.25 x .07) written as a percentage is ?

 0.3 %
 3 %
 30 %
 None of these

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Exp. = (.35 x .0015) / (.25 x .07)
= ( 35 x 15) / (25 x 7 x 100)
= (3/100) x 100 %Correct Option: B
Exp. = (.35 x .0015) / (.25 x .07)
= ( 35 x 15) / (25 x 7 x 100)
= (3/100) x 100 %
= 3%
 The square root of (0.324 x 0.081 x 4.624) / (1.5625 x 0.0289 x 72.9 x 64) is ?

 24
 2.4
 0.024
 None of these

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Given expression =√(0.324 x 0.081 x 4.624) / (1.5625 x 0.0289 x 72.9 x 64)
= √( 324 x 81 x 4624) / (15625 x 289 x 729 x 64)
= √9 / 15625
= 3 /125Correct Option: C
Given expression =√(0.324 x 0.081 x 4.624) / (1.5625 x 0.0289 x 72.9 x 64)
= √( 324 x 81 x 4624) / (15625 x 289 x 729 x 64)
= √9 / 15625
= 3 /125
= 0.024
 √0.289/0.00121 = ?

 170 / 11
 17 / 110
 17 / 1100
 17 / 11

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√ 0.289 / 0.00121
= √ 0.28900 / 0.00121
= √ 28900 / 121Correct Option: A
√ 0.289 / 0.00121
= √ 0.28900 / 0.00121
= √ 28900 / 121
= 170 / 11