141. The average of prime numbers between 1 and 20 is
A. 9
B. 
C. 
D. 8
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142. An examinee has to secure 40% marks to pass an examination. He secures 180 marks and fails b an equal numbers of marks. The total number of marks in the exmination is
A. 900
B. 1000
C. 1050
D. 800
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143. Each side of a square is increased by 10%. The percentage increase in its area is:
A. 25
B. 12.5
C. 20
D. 21
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144. In a college, 1/5th of the girls and 1/8th of the boys took part in social camp. The part of students in the college who took part in the camp is :
A. 13/80
B. 2/13
C. 13/40
D. 4/15
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145. A sphere has a total surface area of 9cm2. Its volume is :
A. 36cm3
B. 9/2cm3
C. 18cm3
D. 4/3cm3
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146. A certain number of men complete a piece of work in 60 days. If there were 8 men more, the work can be finished in 10 days less. The number of men originally is :
A. 36
B. 40
C. 30
D. 32
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147. Of the three numbers, the first is twice the second, and the second is twice the third. The average of the reciprocal of the numbers is 7/12. The numbers are :
A. 20, 10, 5
B. 4, 2, 1
C. 36, 18, 9
D. 16, 8, 4
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148. Volume of a right circular cylinder of height 21 cm and base radius 5 cm is :
A. 1255 cm3
B. 1050 cm3
C. 1175 cm3
D. 1650 cm3
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149. A train is 250 m long. If the train takes 50 seconds to cross a tree by the railway line, then the speed of the train in km/hr is :
A. 10
B. 9
C. 5
D. 18
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150. The ratio of two numbers is 3 : 4 and their HCF is 15. Then the sum of the two numbers is :
A. 105
B. 115
C. 120
D. 110
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Question number 151 to 175 are from Hindi language, which is available here.
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