1.A 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 :

A.1/4

B.1/10

C.7/15

D.8/15

2. A 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?

A.8 hours

B.10 hours

C.12 hours

D.24 hours

3.A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the work?A.40

B.50

C.54

D.60

.

4.If selling price is doubled, the profit triples. Find the profit percent.A.66/2-3

B.100

C.105/1-3

D.120

A.3

B.4

C.5

D.6

A.7

B.8

C.9

D.10

7.The sum of the present ages of a father and his son is 60 years. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be:A.12YEARS

B.14 YEARS

C.18 YEARS

D.20 YEARS

A.76KG

B.76.5KG

C.85KG

D.Data Inadequate

E.None of these

A.35years

B.40years

C.50years

D.None of these

10.What should come in place of both

*x*in the equation x/128=162/xA.12

B.14

C.144

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