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11. A person is 80 years old in 490 and only 70 years old in 500 in which year is he born?
A. 300
B. 400
C. 410
D. 570
(d)
12. A completes a work in 2 days, B in 4 days, C in 9 and D in 18 days. They form group of two such that difference is maximum between them to complete the work. What is difference in the number of days they complete that work?
a. 11/3
b. 12/5
c. 14/3
d. None of these
(c)
13. A motor cyclist participant of a race says “We drove with the speed of 10 miles an hour one way, but while returning because of less traffic we drove on the same route with 15 miles per hour.” What was their average speed in the whole journey ?
a. 14 miles per hour
b. 12 miles per hour
c. 10 miles per hour
d. None of these
(b)
14. Three customers want haircut and a shave. In a saloon, two barbers operate at same speed. They take quarter of an hour for the haircut and 5 mins for the shave. How quickly can they finish the haircut and shave of these three customers ?
a. 25 mins
b. 20 mins
c. 30 mins
d. None of these
(c)
15. Three different types of objects are kept in a bucket. How many times does one need to select object from the bucket to get atleast 3 objects of the same type?
a. 5
b. 7
c. 9
d. 11
(b)