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01. The fraction 101 27/1000 in decimal for is:
A. 01027 B. 10127
C. 101.00027 D. 101.000027

Answer and Explanation

Answer: 101.00027

Explanation:
101 27/100000 = 101 + 27/100000 = 101 + .00027 = 101.00027

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02. How many digits will be there to the right of the decimal point in the product of 95.75 and .02554 ?
A. 5 B. 6
C. 7 D. None of these

Answer and Explanation

Answer: 6

Explanation:
Sum of decimal places = 7.
Since the last digit to the extreme right will be zero (since 5 x 4 = 20), so there will be 6 significant digits to the right of the decimal point.

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03. The least among the following is:
A. 0.2 B. 1 ÷ 0.2
C. 0.2 D. (0.2)2

Answer and Explanation

Answer: (0.2)2

Explanation:
1 ÷ 0.2 = 1/0.2 = 10/2 = 5;

0.2 = 0.222...;
(0.2)2 = 0.04.
0.04 < 0.2 < 0.22....<5.
Since 0.04 is the least, so (0.2)2 is the least.

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04. Arrange the following in descending order: 2/3, 7/9, 5/7, 4/5
A. 2/3 , 4/5 , 5/6 , 7/9 B. 4/5 , 5/7 , 7/9 , 2/3
C. 7/9 , 5/7 , 4/5 , 2/3 D. 4/5 , 7/9 , 5/7 , 2/3

Answer and Explanation

Answer: 4/5 , 7/9 , 5/7 , 2/3

Explanation:
2/3 = 0.66 ; 5/7 = 0.71 7/9 = 0.77 ; 4/5 = 0.8
Hence, the descending order is: 4/5 , 7/9 , 5/7 , 2/3

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05. 12.1212 + 17.0005 – 9.1102 =?
A. 20.0015 B. 20.0105
C. 20.0115 D. 20.1015

Answer and Explanation

Answer: 20.0115

Explanation:
(12.1212 + 17.0005) – 9.1102 (29.1217 – 9.1102) = 20.0115

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06. 892.7 – 573.07 – 95.007 =?
A. 22.623 B. 224.777
C. 233.523 D. 414.637

Answer and Explanation

Answer: 224.777

Explanation:
(892.7 – 573.07 – 95.007) = 224.777

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07. 3889 + 12.952 - ? = 3854.002
A. 47.095 B. 47.752
C. 47.932 D. 47.95

Answer and Explanation

Answer: 47.95

Explanation:
Let 3889 + 12,952 – x = 3854.002
Then, x = (3889 + 12.952) – 3854.002 = 3901.952 – 3854.002 = 47.95

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08. 832.58 – 242.31 = 779.84 - ?
A. 179.57           B. 199.57
C. 295.05            D. None of these

Answer and Explanation

Answer: None of these

Explanation:
Let 832.58 – 242.31 = 779.84 – x
Then x = (779.84 + 241.31) -832.58 = 1022.15 – 832.58 = 189.57

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09. (?) 3 + 543 + 5.43 = 603.26
A. 5 B. 6
C. 8 D. None of theese

Answer and Explanation

Answer: 8

Explanation:
Let x + 543 + 5.43 = 603.26
Then x = 603.26 – (543 + 5.43) = 603.26 – 548.43 = 54.83
Hence the missing digit is 8.

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10.  The number 51,80,00,000 when expressed in scientific notation equals?
A. 51.8 * 106                     B. 51.8 * 107
C. 5.18 * 108                      D. 5.18 * 109

Answer and Explanation

Answer: 5.18 * 108                     

Explanation:
51,80,00,000 = 5.18 * 100000000 = 5.18 * 108

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