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Fractions and Decimals

Fractions and Decimals
( .009 / ?) = .01

9
0.9
0.09
0.009

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let .009 / x = .01;   Then x = .009 / .01=.9 / 1= .9

Fractions and Decimals
Which of the following fractions is greater than 3/4 and less than 5/6?

1/2
2/3
9/10
4/5

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

3/4 = 0.75,  5/6= 0.833,  1/2= 0.5,   2/3= 0.66,4/5= 0.8,   9/10= 0.9. Clearly, 0.8 lies between 0.75 and 0.833.4/5 lies between 3/4 and 5/6. 

Fractions and Decimals
Change 75/100 into decimal number.

7.5
75
750
0.75

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

75/100 = 0.75

Fractions and Decimals
If 3 is added to the denominator of a fraction, it becomes 1/3 and if 4 be added to its numerator, It becomes 3/4, then fraction is ?

3/20
None of these
5/12
1/16

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let the required fraction be p/q∵ p / (q + 3) = 1/3⇒ 3p - q = 3 ...(i)and, (p + 4) / q = 3/4 ⇒ 4p - 3q = -16 ...(ii)Solving these equations, we get p = 5, q = 12∴ Required fraction = 5/12

Fractions and Decimals
( 20 + 8 x 0.5 ) / ( 20 - ? ) = 12

16
18
14
20

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

Let (20 + 8 x 0.5) / ( 20 - y) =12Then, 24 =12 x (20 - y)∴ 12y = 216⇒ y = 18

Fractions and Decimals
The value of (489.1375 x 0.0483 x 1.956) / (0.0873 x 92.581 x 99.749) is closest to:

None of these
6
0.06
0.6

ANSWER EXPLANATION DOWNLOAD EXAMIANS APP

(489.1375 x 0.0483 x 1.956) / (0.0873 x 92.581 x 99.749)= (489 x 0.05 x 2) / (0.09 x 93 x 100)= 489 / (9 x 93 x 10)= (163 / 279) x (1 / 10)= 0.58 / 10= 0.058  or 0.06

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