IBPS PO Prelims 3 oct 2020 Questions and Answers Detailed Explanation
MOST IMPORTANT previous year question answers - 1 EXERCISES
Directions:
What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)
The following question based on IBPS PO topic of previous year question answers
(a) 60
(b) 120
(c) 80
(d) 75
e) 40
The correct answers to the above question in:
Answer: (a)
(1110.02 + 89.81) ÷ ? – $√{15}$ = 15.98
After approximation, we get
(1110 + 90) ÷ ? – 4 = 16
⇒ 1200 ÷ ? = 16 + 4 = 20
⇒ ? = 1200 ÷ 20 = 60
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Read more ibps po prelims 3 oct 2020 Based Previous Year Questions and Answers
Question : 1
? × 350.01 ÷ 3.992 = 983 ÷ 14.001
a) 1.2
b) 1.8
c) 2.8
d) 3.2
e) 4
Answer »Answer: (d)
? × 350.01 ÷ 3.992 = 983 ÷ 14.001
After approximation, we get
? × 350 ÷ 16 = 980 ÷ 14
⇒ ? × 350 ÷ 16 = 70
⇒ ? = (70 × 16) ÷ 350 = 3.2
Question : 2
A and B started a business in a partnership. Ratio between the investments of A and B was 5 : 4. If A invested for 12 months and at the end of the year the ratio of prot was 15 : 8, then for how much time B invested?
a) 8 months
b) 9 months
c) 6 months
d) 10 months
e) None of these
Answer »Answer: (a)
Let B invested for x months, then
According to question we get,
(5 × 12) : (4 × x) = 15 : 8
⇒ 15 : x = 15 : 8
⇒ x = 8
Question : 3
A and B together can do a piece of work in 12 days, A and C together can do the same work in 15 days. If B and C together can do the same work in 20 days, then in how many days A, B and C together can complete the same work?
a) 8
b) 6
c) 10
d) 9
e) None of these
Answer »Answer: (c)
Let the total work = 60 (LCM of 12, 15 and 20)
Efciency of A and B together = $60/12$ = 5
Efciency of B and C together = $60/20$ = 3
Efciency of C and A together = $60/15$ = 4
So, efciency of A, B and C together = $\text"5+3+4"/2$ = 6
Hence, the required number of days = $60/6$ = 10 days.
Question : 4
? ÷ 2.997 + 799.98 × 8.9 = 9199.978
a) 6000
b) 5000
c) 4000
d) 4800
e) 6400
Answer »Answer: (a)
? ÷ 2.997 + 799.98 × 8.9 = 9199.978
After approximation, we get
? ÷ 3 + 800 × 9 = 9200
⇒ ? = (9200 – 7200) × 3 = 2000 × 3 = 6000.
?= 49.99% of 6400.002 ÷ 999.99
≈ 50% of 6400 ÷ 1000
= 3200 ÷ 1000 = 3.2
Question : 5
49.99% of 6400.002 ÷ 999.99 = ?
a) 3.6
b) 5
c) 4.8
d) 2.4
e) 3.2
Answer »Answer: (e)
?= 49.99% of 6400.002 ÷ 999.99
≈ 50% of 6400 ÷ 1000
= 3200 ÷ 1000 = 3.2
Question : 6
468.02 + 79.91 ÷ 5.01 = ?2
a) 12
b) 11
c) 18
d) 22
e) 24
Answer »Answer: (d)
?2 = 468.02 + 79.91 ÷ 5.01
≈ 468 + 80 ÷ 5
= 468 + 16
= 484 = 222
⇒ ? = 22
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