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46.
The value of
 (2.3)3 - .027 (2.3)2 + .69 + .09

• A.
0
• C.
2
• B.
1.6
• D.
3.4
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Explanation :

Given expression =
 (2.3)3 - (0.3)3 (2.3)2 + (2.3 x 0.3) + (0.3)2
=
 a3 - b3 a2 + ab + b2

 = (a - b) = (23 - 0.3) = 2

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47.
892.7 - 573.07 - 95.007 = ?
• A.
224.623
• C.
233.523
• B.
224.777
• D.
414.637
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Explanation :
 Given expression = 8927 - (573.07 + 95.007) = 8927 - 668.077 = 224.623
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48.
(0.09 x 7.3) is equal to:
• A.
.6
• C.
.67
• B.
.657
• D.
.657
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Explanation :

0.09 x 7.3 =
 9 99
x 7
 3 9
=
 1 11
x
 66 9
=
 2 3
= 0.6

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49.
Which of the following fractions is the smallest?
•  A. 13 16
•  C. 17 21
•  B. 15 19
•  D. 7 8
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Explanation :

We have :
 13 16
= 0.8125,
 15 19
= 0.7894,
 17 21
= 0.8095 and
 7 8
= 0.875.

Since 0.7894 is the smallest, so
 15 19

is the smallest

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50.
If 213 x 16 = 3408, then 1.6 x 21.3 is equal to :
• A.
0.3408
• C.
34.08
• B.
3.408
• D.
340.8
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Explanation :

1.6 x 213 =
 16 10
x
 213 10
=
 16 x 213 100
=
 3408 100
= 34.08

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