Decimal Fraction

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
———

Question:
34.95 + 240.016 + 23.98 = ?

[A].

298.0946

[B].

298.111

[C].

298.946

[D].

299.09

Answer: Option C

Explanation:

34.95
240.016
+ 23.98
——–
298.946
——–

Question: Which of the following are in descending order of their value ?

[A].

1	,	2	,	3	,	4	,	5	,	6
3		5		7		5		6		7

[B].

1	,	2	,	3	,	4	,	5	,	6
3		5		5		7		6		7

[C].

1	,	2	,	3	,	4	,	5	,	6
3		5		5		6		7		7

[D].

6	,	5	,	4	,	3	,	2	,	1
7		6		5		7		5		3

Answer: Option D

Explanation:

No answer description available for this question.

Question:
What decimal of an hour is a second ?

[A].

.0025

[B].

.0256

[C].

.00027

[D].

.000126

Answer: Option C

Explanation:

Required decimal =	1	=	1	= .00027
	60 x 60		3600