Aptitude

Question:
The rational number for recurring decimal 0.125125…. is:

[A].

63

487

[B].

119

993

[C].

125

999

[D].

None of these

Answer: Option C

Explanation:

0.125125… = 0.125 =	125
	999

Question:
When 0.232323….. is converted into a fraction, then the result is:

[A].

1

5

[B].

2

9

[C].

23

99

[D].

23

100

Answer: Option C

Explanation:

0.232323… = 0.23 =	23
	99

Question:
The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity Y ?

[A].

2010

[B].

2011

[C].

2012

[D].

2013

Answer: Option B

Explanation:

Suppose commodity X will cost 40 paise more than Y after z years.

Then, (4.20 + 0.40z) – (6.30 + 0.15z) = 0.40

0.25z = 0.40 + 2.10

z =	2.50	=	250	= 10.
	0.25		25

X will cost 40 paise more than Y 10 years after 2001 i.e., 2011.

Question:
4.036 divided by 0.04 gives :

[A].

1.009

[B].

10.09

[C].

100.9

[D].

None of these

Answer: Option C

Explanation:

4.036	=	403.6	= 100.9
0.04		4

Question:
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: Option B

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.

Question:
0.04 x 0.0162 is equal to:

[A].

6.48 x 10-3

[B].

6.48 x 10-4

[C].

6.48 x 10-5

[D].

6.48 x 10-6

Answer: Option B

Explanation:

4 x 162 = 648. Sum of decimal places = 6.
So, 0.04 x 0.0162 = 0.000648 = 6.48 x 10-4

Question:
0.002 x 0.5 = ?

[A].

0.0001

[B].

0.001

[C].

0.01

[D].

0.1

Answer: Option B

Explanation:

2 x 5 = 10.

Sum of decimal places = 4

0.002 x 0.5 = 0.001

Question:
Which of the following is equal to 3.14 x 106 ?

[A].

314

[B].

3140

[C].

3140000

[D].

None of these

Answer: Option C

Explanation:

3.14 x 106 = 3.14 x 1000000 = 3140000.

Question:
3889 + 12.952 – ? = 3854.002

[A].

47.095

[B].

47.752

[C].

47.932

[D].

47.95

Answer: Option D

Explanation:

Let 3889 + 12.952 – x = 3854.002.

Then x = (3889 + 12.952) – 3854.002

   = 3901.952 – 3854.002

   = 47.95.

Question:
617 + 6.017 + 0.617 + 6.0017 = ?

[A].

6.2963

[B].

62.965

[C].

629.6357

[D].

None of these

Answer: Option C

Explanation:

617.00
6.017
0.617
+ 6.0017
——–
629.6357
———