51.
When .36 is written in simplest fractional form, the sum of the numerator and the denominator is:
• A.
15
• C.
114
• B.
45
• D.
135
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Explanation :

0.36 =
 36 100
=
 9 25
Sum of Numerator and Denominator = 9 + 25 = 34

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52.
(8.31 + 0.6 + 0.002) is equal to:
• A.
8.912
• C.
8.979
• B.
8.912
• D.
8.979
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Explanation :

(8.31 + 0.6 + 0.002) = 8 +
 31 - 3 90
+
 6 9
+
 2 900
+
 7200 + 280 + 600 + 2 900

 8082 900
= 8
 882 900
= 8 +
 979 - 97 900
= 8.979

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53.
The value of (68.237)2 - (31.763)2 is:
• A.
3.6474
• C.
364.74
• B.
36.474
• D.
3647.4
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Explanation :

Given expression = (a2 - b2) = (a + b) (a - b)

 = (68.237 + 31.763) (68.237 - 31.763)

 = (100 x 36.474) = 3647.4

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54.
The value of
 (0.06)2 - (0.47)2 + (0.079)2 (0.006)2 + (0.047)2 + (0.0079)2
is:
• A.
0.1
• C.
100
• B.
10
• D.
1000
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Explanation :

 Given expression =
a2 + b2 + c2

 a 10
2 +
 b 10
2 +
 c 10
2
 , where a = 0.6, b = 0.47 and c = 0.079.

=
 100 (a2 + b2 + c2) (a2 + b2 + c2)
= 100

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55.
The value of
 8.6 x 5.3 + 8.6 x 4.7 4.3 x 9.7 - 4.3 x 8.7
is :
• A.
3.3
• C.
13.9
• B.
6.847
• D.
20
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Explanation :

Given expression =
 8.6 x (5.3 + 4.7) 4.3 x (9.7 - 8.7)
=
 8.6 x 10 4.3 x 1
= 20

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