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)

1

The average of fifteen numbers is 0. In those 15, at the most, how many may be greater than zero?

0

1

10

14

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2

The average of six numbers is S and the average of three of these is T.If the average of the remaining three is U, then

S= T + U

2S= T + U

S= 2T + 2U

None

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4

The average age of a husband and his wife was 24.5 years at the time of their marriage. After five years they have a 3 years old child.The average age of the family now is

20.66 years

23 years

28.5 years

29.3 years

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5

The average weight of six oarsmen in a boat is increased by 1.2 kg when one of the crew, who weighs 64 kg is replaced by a new man. find the weight of the new man.

71.2 kg

72 kg

68 kg

63 kg

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6

The average age of the mother and her six children is 12 years which is reduced by 5 years if the age of the mother is excluded. How old is the mother?

40 years

42 years

48 years

60 years

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