basic maths MCQs – Page 9

Practise focused basic maths questions with marked answers for exam preparation and subject revision.

basic maths Mcqs

161. Two pipes P and Q can fill a cistern in 12 minutes and 16 minutes respectively. Simultaneously both the pipes are opened together, then after how much time Q should be closed so that the tank is full in 9 min ?
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A. 3 min

B. 4 min

C. 5 min

D. 2 min

162. The average weight of 25 persons sitting in a boat had some value. A new person added to them whose weight was 46 kg only. Due to his arrival, the average weight of all the persons decreased by 5 kg. Find the average weight of first 25 persons?
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A. None

B. 56 kg

C. 55 kg

D. 62 kg

163. The average salary per head of the entire staff of an office including the officers and clerks is Rs.90. The average salary of officers is Rs.600 and that of the clerks is Rs.84. If the number of officers is 2, find the number of officers in the office?
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A. 840

B. 1020

C. 960

D. 1540

164. A and B can do a piece of work in 21 and 24 days respectively.They start the work together and after some days, A leaves and B completes the rest of the task in 9 days. After how many days did A leave?
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A. 7

B. 6

C. 8

D. 5

165. What are Prime Numbers?
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A. Which can be divided by Even Numbers

B. Which can be divided by any Number

C. Which can be divided by Number 1 & by itself Number

D. Which can be divided by Odd Numbers

166. The average of runs of a cricket player of 10 innings was 32. How many runs must he make in his next innings so as to increase his average of runs by 4?
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A. 70

B. 4

C. 76

D. 2

167. The average weight of a group of boys is 30 kg. After a boy of weight 35 kg joins the group, the average weight of the group goes up by 1 kg. Find the number of boys in the group originally?
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A. 5

B. 4

C. 6

D. 7

168. A can do a particular work in 6 days . B can do the same work in 8 days. A and B signed to do it for Rs. 3200. They completed the work in 3 days with the help of C. How much is to be paid to C?
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A. Rs. 380

B. Rs. 420

C. Rs. 600

D. Rs. 400

169. A boat goes 24 km downstream in 10 hours, it takes 2 hours more to cover the same distance against the stream. What is the speed of the boat in still water?
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A. 4 km/hr

B. None of these

C. 4.2 km/hr

D. 2km/hr

E. 2.8 km/hr

170. Sarfaraz obtained 76, 65, 82, 67 and 85 marks (out of 100) in English, Mathematics, Physics, Chemistry and Biology. What are his average marks?
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A. 69

B. 72

C. None of these

D. 65

171. A boat takes half time in moving a certain distance downstream than upstream. What is the ratio between the rate in still water and rate of current?
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A. 3 : 1

B. 1:02

C. 1:03

D. 2:01

172. A person can swim in still water at 4 km/h. If the speed of water 2 km/h, how many hours will the man take to swim back against the current for 6km?
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A. 3

B. 4

C. Insufficient data

D. 4 (1/2)

173. A man can row with a speed of 15 kmph in still water. If the stream flows at 5 kmph, then the speed in downstream is________?
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A. 20 kmph

B. 22 kmph

C. 5 kmph

D. 10 kmph

174. The average height of 50 pupils in a class is 150 cm. Five of them whose height is 146 cm, leave the class and five others whose average height is 156 cm, join. The new average height of the pupils of the class (in cm) is __________ .
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A. 151

B. 153

C. 149

D. 152

175. If two pipes function together, the cistern will be filled in 6 hrs. One pipe fills the cistern 5 hrs. faster than the other. How many hours it take the second pipe to fill the cistern?
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A. 15 hrs

B. 5 hrs

C. 10 hrs

D. 20 hrs

176. The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?
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A. 79

B. 37

C. 72

D. 45

177. A team of eight entered for a shooting competition. The best marks man scored 85 points. If he had scored 92 points, the average scores for. The team would have been 84. How many points altogether did the team score?
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A. 632

B. 656

C. 625

D. 665

178. A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 2 chocolates and each girl received 3 chocolates. Find the respective number of boys and girls?
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A. 60, 60

B. 40, 80

C. 70, 50

D. 50, 70

179. Find the average of the series : 312, 162, 132, 142 and 122?
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A. 186

B. 162

C. 174

D. 194

180. The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average of the team?
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A. 24 years

B. 23 years

C. None of these

D. 25 years

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