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Aptitude - Decimal Fraction

Exercise : Decimal Fraction - General Questions
6.
When 0.232323..... is converted into a fraction, then the result is:
1
5
2
9
23
99
23
100
Answer: Option
Explanation:
0.232323... = 0.23 = 23
99
7.
.009 = .01
?
.0009
.09
.9
9
Answer: Option
Explanation:
Let .009 = .01;     Then x = .009 = .9 = .9
x .01 1
8.
The expression (11.98 x 11.98 + 11.98 x x + 0.02 x 0.02) will be a perfect square for x equal to:
0.02
0.2
0.04
0.4
Answer: Option
Explanation:

Given expression = (11.98)2 + (0.02)2 + 11.98 x x.

For the given expression to be a perfect square, we must have

11.98 x x = 2 x 11.98 x 0.02 or x   = 0.04

9.
(0.1667)(0.8333)(0.3333) is approximately equal to:
(0.2222)(0.6667)(0.1250)
2
2.40
2.43
2.50
Answer: Option
Explanation:
Given expression
= (0.3333) x (0.1667)(0.8333)
(0.2222) (0.6667)(0.1250)
= 3333 x
1 x 5
6 6
2222
2 x 125
3 1000
= 3 x 1 x 5 x 3 x 8
2 6 6 2
= 5
2
= 2.50
10.
3889 + 12.952 - ? = 3854.002
47.095
47.752
47.932
47.95
Answer: Option
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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