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```1.What is the average of all the odd numbers between 40 and 90 ?

A) 65.5

B) 98

C) 130

D) 65

**Answer:**

**Explanation:**

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```2.The average of 99 items is 27. if 3 is added to each number of the series, the new average is

A) 24

B) 27

C) 33

D) 30

**Answer:**

**Explanation:**

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```3.The average of 18 numbers is 24. If each item of the series is multiplied by 3, the new average is :

A) 24

B) 27

C) 72

D) 8

**Answer:**

**Explanation:**

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```5.If the average of five consecutive numbers is 23, find the smallest number ?

A) 20

B) 21

C) 22

D) 25

**Answer:**

**Explanation:**

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```6.If sum of three consecutive odd is 63, find the first term ?

A) 19

B) 21

C) 22

D) 23

**Answer:**

**Explanation:**

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```9.The average age of 40 students in a class is15 years. If the age of teacher is also include, the average becomes 16 years, find the age of the teacher ?

A) 15 years

B) 16 years

C) 55 years

D) 56 years

**Answer:**

**Explanation:**

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```10.The average score of a player in 10 matches is 12. If in the 11th match his score is 34, what is the new average ?

A) 11

B) 12

C) 13

D) 14

**Answer:**

**Explanation:**