ARITHMETICS MCQS

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

 

5.A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?

A.3

B.4

C.5

D.6

 

6.A is two years older than B who is twice as old as C. If the total of the ages of A, B and C be 27, the how old is B?

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

 

8.The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?

A.76KG

B.76.5KG

C.85KG

D.Data Inadequate

E.None of these

 

9.The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

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/x

A.12

B.14

C.144

D.196

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