Decimal Fraction - General Questions (4)

25.

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

26.

If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?

A.	0.172
B.	1.72
C.	17.2
D.	172

Answer: Option C

Explanation:

29.94	=	299.4
1.45	=	14.5

=		2994	x	1		[ Here, Substitute 172 in the place of 2994/14.5 ]
		14.5		10

=	172
	10

= 17.2

27.

The value of	0.1 x 0.1 x 0.1 + 0.02 x 0.02 x 0.02	is:
	0.2 x 0.2 x 0.2 + 0.04 x 0.04 x 0.04

A.	0.0125
B.	0.125
C.	0.25
D.	0.5

Answer: Option B

Explanation:

Given expression =	(0.1)³ + (0.02)³	=	1	= 0.125
	2³ [(0.1)³ + (0.02)³]		8

28.

The value of	(0.96)³ - (0.1)³	is:
	(0.96)² + 0.096 + (0.1)²

A.	0.86
B.	0.95
C.	0.97
D.	1.06

Answer: Option A

Explanation:

Given expression

=	(0.96)³ - (0.1)³
	(0.96)² + (0.96 x 0.1) + (0.1)²

=		a³ - b³
		a² + ab + b²

= (a - b)

= (0.96 - 0.1)

= 0.86

29.

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

30.

Evaluate :	(2.39)² - (1.61)²
	2.39 - 1.61

A.	2
B.	4
C.	6
D.	8

Answer: Option B

Explanation:

Given Expression =	a² - b²	=	(a + b)(a - b)	= (a + b) = (2.39 + 1.61) = 4.
	a - b		(a - b)

Decimal Fraction - General Questions (4)

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