Approximation Questions for RRB Group D PDF
Download Top-10 RRB Group-D Approximation Questions PDF. RRB Group – D Approximation questions based on asked questions in previous exam papers very important for the Railway Group-D exam.
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Question 1: $ (1-\frac{1}{2}) (1-\frac{1}{3}) (1-\frac{1}{4}) …..(1-\frac{1}{40}) = ?$
a) $ \frac{1}{40} $
b) $ \frac{1}{20} $
c) Countless
d) Zero
Question 2: $ 5^{5} \div (5^{3} \times 2^{2}) $ is
a) 125
b) 31.25
c) 6.25
d) 12.5
Question 3: (0.07% of 1250) – (0.02% of 650) = ?
a) 0.545
b) 0.625
c) 0.745
d) None of the above
Question 4: 3251 + 587 + 369 – ? = 3007
a) 1250
b) 1300
c) 1375
d) 1200
Question 5: $132 \times 16 \div 2^3 + 4 = ?$
a) 792
b) 176
c) 264
d) 268
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Question 6: $384 \div 2^5 \times 3 + 8 = ?$
a) 12
b) 132
c) 3
d) 44
Question 7: $3.0005 – 1.748 = ?$
a) $1.2525$
b) $1.257$
c) $2.8257$
d) $1.9257$
Question 8: Given $17 \times 29 = 493$, then $170 \times 0.029 = ?$
a) 0.0493
b) 4.93
c) 0.493
d) 49.3
Question 9: 25 divided by $\frac{1}{5}$
a) $\frac{1}{125}$
b) 5
c) 25
d) 125
Question 10: $ \frac{3}{5} + \frac{3}{7} = ? $
a) $\frac{9}{35}$
b) $\frac{6}{12}$
c) $1\frac{1}{35}$
d) $\frac{6}{35}$
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Answers & Solutions:
1) Answer (A)
1 – 1/2 = 1/2
1 – 1/3 = 2/3
1 – 1/4 = 3/4
The denominator of the first term gets cancelled by the numerator of the second term and so on…
So, the final value = 1/40
2) Answer (C)
$ 5^{5} \div (5^{3} \times 2^{2}) $=$5^{2}/2^{2}$
=25/4=6.25
3) Answer (C)
(0.07% of 1250) – (0.02% of 650)
.8750 – .1300
.7450
4) Answer (D)
Let’s assume ? = Y.
3251 + 587 + 369 – Y = 3007
4207 – Y = 3007
4207 – 3007 = Y
Y = 1200
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5) Answer (D)
6) Answer (D)
7) Answer (A)
8) Answer (B)
9) Answer (D)
The given question can be written as,
25 x (1/5) or 25 x 5 which is equal to 125
Hence, option D is the correct answer.
10) Answer (C)
$ \frac{3}{5} + \frac{3}{7} $
LCM of 7 and 5 is 35 So the equation can be written as,
= $\frac{21 + 15}{35}$
= $\frac{36}{35} = 1\frac{1}{35}$
Hence, option C is the correct answer.
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We hope this Approximation Questions PDF for RRB Group-D Exam will be highly useful for your preparation.
