operations on numbers (6.papers)

hcf and lcm (5.papers)

averages (8.papers)

problems on ages (9.papers)

percentage (4.papers)

profit and loss (4.papers)

ratio and proportion (5.papers)

chain rule (5.papers)

time and work (4.papers)

pipes and cisterns (5.papers)

time and distance (5.papers)

problems on trains (8.papers)

boats and streams (7.papers)

partnership (6.papers)

simple interest (4.papers)

compound interest (2.papers)

permutation and combination (3.papers)

clock (2.papers)

calendar (3.papers)

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2

The average weight of 9 apples increases by 20 g if one of them weighing 120 g is replaced by another. The weight of the new apple is

180 g

200 g

260 g

300 g

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9

The average of 35 numbers is 42. If three numbers, 35, 72 and 85 are removed, the average of the remaining numbers is

39.93

36

36.5

37.52

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11

Four years ago, the average age of a family of 5 members was 17 years. A baby having born in between, the average age of the family is 18 years now. The present age of the baby is:

1.5 yrs

3 yrs

2.4 yrs

3.8 yrs

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13

The average age of 25 student of a class is 15 year. When 10 new students are admitted, the average is increased by 0.2 years. The average age of new students is

15.2 yrs

15.7 yrs

16.2 yrs

16.4 yrs

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16

A bike owner buys petrol at Rs 75, Rs. 80 and Rs. 85 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs. 40000 each year?

Rs 79.8

Rs 80.4

Rs 85.5

Rs 90

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19

Three years ago, the average age of M and N was 18 years. With P joining them, the average age becomes 22 years, How old is P now?

24 years

27 years

28 years

30 years

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