Mathematics Olympiad Class-8 Test Prep-4

Test Preparation on Mathematics Olympiad Class-8 Test Prep-4

1.

P is able to do a piece of work in 15 days and Q can do the same work in 20 days. If they can work together for 4 days, what is the fraction of work left?

A. 7/15 B. 11/15

C. 2/11 D. 8/15

1A
2B
3C
4D

2.

P can lay railway track between two stations in 16 days. Q can do the same job in 12 days. With the help of R, they completes the job in 4 days. How much days does it take for R alone to complete the work?

A. 9(1/5) days B. 9(3/5) days

C. 9(2/5) days D. 10 days

1A
2B
3C
4D

3.

P, Q and R can do a work in 20, 30 and 60 days respectively. How many days does it need to complete the work if P does the work and he is assisted by Q and R on every third day?

A. 15 days B. 9 days

C. 10 days D. 14 days

1A
2B
3C
4D

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