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No. of Questions 
10 
Time 
10 min 
Medium 
english 
Marks 
10 
Positive Marks 
+1 
Negative Marks 
0 
INSTRUCTION : All question carry 1 mark and there is only single option correct for every questionMark review to see the question later 
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Question 1 of 10
1. Question
1 pointsA can do a work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work that is left is :
Correct
Answer: Option D
Explanation:
A’s 1 day’s work =1/15
B’s 1 day’s work =1/20
(A + B)’s 1 day’s work =1/20 +1/15= 7/60
(A + B)’s 4 day’s work = 4*7/60
Therefore, Remaining work =17/15=8/15Incorrect
Answer: Option D
Explanation:
A’s 1 day’s work =1/15
B’s 1 day’s work =1/20
(A + B)’s 1 day’s work =1/20 +1/15= 7/60
(A + B)’s 4 day’s work = 4*7/60
Therefore, Remaining work =17/15=8/15 
Question 2 of 10
2. Question
1 pointsA can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
Correct
Answer: Option C
Explanation:
(A + B + C)’s 1 day’s work = 1 , 4 A’s 1 day’s work = 1 , 16 B’s 1 day’s work = 1 . 12 C’s 1 day’s work = 1 – 1 + 1 = 1 – 7 = 5 . 4 16 12 4 48 48 So, C alone can do the work in 48 = 9 3 days. 5 5 Incorrect
Answer: Option C
Explanation:
(A + B + C)’s 1 day’s work = 1 , 4 A’s 1 day’s work = 1 , 16 B’s 1 day’s work = 1 . 12 C’s 1 day’s work = 1 – 1 + 1 = 1 – 7 = 5 . 4 16 12 4 48 48 So, C alone can do the work in 48 = 9 3 days. 5 5 
Question 3 of 10
3. Question
1 pointsA, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third da
Correct
Answer: Option B
Explanation:
A’s 2 day’s work = 1 x 2 = 1 . 20 10 (A + B + C)’s 1 day’s work = 1 + 1 + 1 = 6 = 1 . 20 30 60 60 10 Work done in 3 days = 1 + 1 = 1 . 10 10 5 Now, 1 work is done in 3 days. 5 Whole work will be done in (3 x 5) = 15 days
Incorrect
Answer: Option B
Explanation:
A’s 2 day’s work = 1 x 2 = 1 . 20 10 (A + B + C)’s 1 day’s work = 1 + 1 + 1 = 6 = 1 . 20 30 60 60 10 Work done in 3 days = 1 + 1 = 1 . 10 10 5 Now, 1 work is done in 3 days. 5 Whole work will be done in (3 x 5) = 15 days

Question 4 of 10
4. Question
1 pointsA is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it i
Correct
Answer: Option B
Explanation:
Ratio of times taken by A and B = 1 : 3.
The time difference is (3 – 1) 2 days while B take 3 days and A takes 1 day.
If difference of time is 2 days, B takes 3 days.
If difference of time is 60 days, B takes 3 x 60 = 90 days. 2 So, A takes 30 days to do the work.
A’s 1 day’s work = 1 30 B’s 1 day’s work = 1 90 (A + B)’s 1 day’s work = 1 + 1 = 4 = 2 30 90 90 45 A and B together can do the work in 45 = 22 1 days. 2 2 Incorrect
Answer: Option B
Explanation:
Ratio of times taken by A and B = 1 : 3.
The time difference is (3 – 1) 2 days while B take 3 days and A takes 1 day.
If difference of time is 2 days, B takes 3 days.
If difference of time is 60 days, B takes 3 x 60 = 90 days. 2 So, A takes 30 days to do the work.
A’s 1 day’s work = 1 30 B’s 1 day’s work = 1 90 (A + B)’s 1 day’s work = 1 + 1 = 4 = 2 30 90 90 45 A and B together can do the work in 45 = 22 1 days. 2 2 
Question 5 of 10
5. Question
1 pointsA alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C?
Correct
Answer: Option B
Explanation:
C’s 1 day’s work = 1 – 1 + 1 = 1 – 7 = 1 . 3 6 8 3 24 24 A’s wages : B’s wages : C’s wages = 1 : 1 : 1 = 4 : 3 : 1. 6 8 24 C’s share (for 3 days) = Rs. 3 x 1 x 3200 = Rs. 400. 24 Incorrect
Answer: Option B
Explanation:
C’s 1 day’s work = 1 – 1 + 1 = 1 – 7 = 1 . 3 6 8 3 24 24 A’s wages : B’s wages : C’s wages = 1 : 1 : 1 = 4 : 3 : 1. 6 8 24 C’s share (for 3 days) = Rs. 3 x 1 x 3200 = Rs. 400. 24 
Question 6 of 10
6. Question
1 pointsIf 6 men and 8 boys can do a piece of work in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken by 15 men and 20 boys in doing the same type of work will be:
Correct
Answer: Option A
Explanation:
Let 1 man’s 1 day’s work = x and 1 boy’s 1 day’s work = y.
Then, 6x + 8y = 1 and 26x + 48y = 1 . 10 2 Solving these two equations, we get : x = 1 and y = 1 . 100 200 (15 men + 20 boy)’s 1 day’s work = 15 + 20 = 1 . 100 200 4 15 men and 20 boys can do the work in 4 days.
Incorrect
Answer: Option A
Explanation:
Let 1 man’s 1 day’s work = x and 1 boy’s 1 day’s work = y.
Then, 6x + 8y = 1 and 26x + 48y = 1 . 10 2 Solving these two equations, we get : x = 1 and y = 1 . 100 200 (15 men + 20 boy)’s 1 day’s work = 15 + 20 = 1 . 100 200 4 15 men and 20 boys can do the work in 4 days.

Question 7 of 10
7. Question
1 pointsA can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
Correct
Answer: Option C
Explanation:
A’s 1 hour’s work = 1 ; 4 (B + C)’s 1 hour’s work = 1 ; 3 (A + C)’s 1 hour’s work = 1 . 2 (A + B + C)’s 1 hour’s work = 1 + 1 = 7 . 4 3 12 B’s 1 hour’s work = 7 – 1 = 1 . 12 2 12 B alone will take 12 hours to do the work.
Incorrect
Answer: Option C
Explanation:
A’s 1 hour’s work = 1 ; 4 (B + C)’s 1 hour’s work = 1 ; 3 (A + C)’s 1 hour’s work = 1 . 2 (A + B + C)’s 1 hour’s work = 1 + 1 = 7 . 4 3 12 B’s 1 hour’s work = 7 – 1 = 1 . 12 2 12 B alone will take 12 hours to do the work.

Question 8 of 10
8. Question
1 pointsA can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:
Correct
Answer: Option C
Explanation:
(A + B)’s 1 day’s work = 1 10 C’s 1 day’s work = 1 50 (A + B + C)’s 1 day’s work = 1 + 1 = 6 = 3 . …. (i) 10 50 50 25 A’s 1 day’s work = (B + C)’s 1 day’s work …. (ii)
From (i) and (ii), we get: 2 x (A’s 1 day’s work) = 3 25 A’s 1 day’s work = 3 . 50 B’s 1 day’s work 1 – 3 = 2 = 1 . 10 50 50 25 So, B alone could do the work in 25 days.
Incorrect
Answer: Option C
Explanation:
(A + B)’s 1 day’s work = 1 10 C’s 1 day’s work = 1 50 (A + B + C)’s 1 day’s work = 1 + 1 = 6 = 3 . …. (i) 10 50 50 25 A’s 1 day’s work = (B + C)’s 1 day’s work …. (ii)
From (i) and (ii), we get: 2 x (A’s 1 day’s work) = 3 25 A’s 1 day’s work = 3 . 50 B’s 1 day’s work 1 – 3 = 2 = 1 . 10 50 50 25 So, B alone could do the work in 25 days.

Question 9 of 10
9. Question
1 pointsA does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole wor
Correct
Incorrect
A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work? A. 23 days B. 37 days C. 37 D. 40 days Answer: Option C
Explanation:
Whole work is done by A in 20 x 5 = 25 days. 4 Now, 1 – 4 i.e., 1 work is done by A and B in 3 days. 5 5 Whole work will be done by A and B in (3 x 5) = 15 days.
A’s 1 day’s work = 1 , (A + B)’s 1 day’s work = 1 . 25 15 B’s 1 day’s work = 1 – 1 = 4 = 2 . 15 25 150 75 So, B alone would do the work in 75 = 37 1 days. 2 2 
Question 10 of 10
10. Question
1 pointsA machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?
Correct
Answer: Option D
Explanation:
(P + Q + R)’s 1 hour’s work = 1 + 1 + 1 = 37 . 8 10 12 120 Work done by P, Q and R in 2 hours = 37 x 2 = 37 . 120 60 Remaining work = 1 – 37 = 23 . 60 60 (Q + R)’s 1 hour’s work = 1 + 1 = 11 . 10 12 60 Now, 11 work is done by Q and R in 1 hour. 60 So, 23 work will be done by Q and R in 60 x 23 = 23 hours 2 hours. 60 11 60 11 So, the work will be finished approximately 2 hours after 11 A.M., i.e., around 1 P.M.
Incorrect
Answer: Option D
Explanation:
(P + Q + R)’s 1 hour’s work = 1 + 1 + 1 = 37 . 8 10 12 120 Work done by P, Q and R in 2 hours = 37 x 2 = 37 . 120 60 Remaining work = 1 – 37 = 23 . 60 60 (Q + R)’s 1 hour’s work = 1 + 1 = 11 . 10 12 60 Now, 11 work is done by Q and R in 1 hour. 60 So, 23 work will be done by Q and R in 60 x 23 = 23 hours 2 hours. 60 11 60 11 So, the work will be finished approximately 2 hours after 11 A.M., i.e., around 1 P.M.