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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6

Average of 100 numbers is 100. If the first number is increased by 1, the second number by 2, the third number by 3 and so on. What will be the new average?

148.5

153.5

150.5

145.5

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17

Of the three numbers, the first is twice as second and three times the third. The average of the three numbers is 66, and the three numbers in order are?

116,58,36

98,49,33

126,63,36

108,54,36

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20

The average height of 25 students is 165 cm. Later it is found that while calculating the average, the reading of 170 cm, was wrongly read as 117. what is the correct average?

167.12

165.4

172.4

176.56

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