basic maths MCQs – Page 11

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

basic maths Mcqs

201. The average monthly salary of 20 employees in an organisation is Rs. 1500. If the managers salary is added, then the average salary increases by Rs. 100. What is the managers monthly salary?
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A. Rs. 3600

B. Rs. 2400

C. Rs. 4800

D. Rs. 2000

202. The average of women and child workers in a factory was 15%yr. The average age of all the 16 children was 8yr and average age of women workers was 22 yrs if ten women workers were married then the number of unmarried women workers were________?
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A. 6

B. 12

C. 8

D. 16

203. The speed at which a man can row a boat in still water is 15 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 60 metres?
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A. 15 seconds

B. None of these

C. 20 seconds

D. 10 seconds

E. 12 seconds

204. Rs. 6000 is lent out in two parts. One part is lent at 7% p.a simple interest and the other is lent at 10% p.a simple interest. The total interest at the end of one year was Rs. 450. Find the ratio of the amounts lent at the lower rate and higher rate of interest?
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A. 2:01

B. 4:01

C. 3:02

D. 5 : 1

205. The average of five results is 46 and that of the first four is 45. The fifth result is__________?
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A. 50

B. 1

C. 10

D. 12.5

206. If X and Y complete a certain work in 10 days, Y and Z in 16 days and X and Z in 22 days, find the time required for each one to complete the work while working separately.
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A. 30, 40, 60 days

B. 120, 40, 60 days

C. 120, 60, 80 days

D. 40, 30, 120 days

207. A and B together take 6 days to complete a task. B and C together take 12 days to complete the same task. A and C together take 8 days to complete it. If A, B and C are working together, how long does it take for them to complete the task?
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A. 5(1/3) days

B. 1(1/3) days

C. 4(2/3) days

D. 4 days

208. The average of first 10 even numbers is___________?
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A. 11

B. 22

C. 18

D. 9

209. A person can row at 9 kmph and still water. He takes 4 1/2 hours to row from A to B and back. What is the distance between A and B if the speed of the stream is 1 kmph?
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A. 28 km

B. 25 km

C. 32 km

D. None of these

E. 24 km

210. The average weight of 16 boys in a class is 50.25 kg and that of the remaining 8 boys is 45.15 kg. Find the average weights of all the boys in the class.
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A. 48.55 kg

B. 48 kg

C. 49.25 kg

D. 47.55 kg

211. If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new number is___________?
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A. 30

B. 90

C. 70

D. 40

212. In a hostel there were 100 students. To accommodate 20 more students the average is decreased by rupees 5. But total expenditure increased by Rs.400. Find the total expenditure of the hostel now?
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A. Rs.5400

B. Rs.5000

C. Rs.4600

D. Rs.2300

213. The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?
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A. 10 km/hr

B. 8 km/hr

C. 5km/hr

D. 15 km/hr

214. The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and the average salary of the rest is Rs. 6000. The total number of workers in the workshop is__________________?
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A. 23

B. 21

C. 20

D. 22

215. The average weight of a group of persons increased from 48 kg to 51 kg, when two persons weighing 78 kg and 93 kg join the group. Find the initial number of members in the group?
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A. 23

B. 21

C. 24

D. 22

216. The average salary of workers in an industry is Rs.200 the average salary of technicians being Rs.400 and that of non-technicians being Rs.125. What is the total number of workers?
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A. 275

B. 550

C. 250

D. 400

217. The total marks obtained by a student in Mathematics and Physics is 60 and his score in Chemistry is 20 marks more than that in Physics. Find the average marks scored in Mathematics and Chemistry together.
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A. Data inadequate

B. 30

C. 25

D. 40

218. The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then the weight of B is___________?
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A. 17 kg

B. 31 kg

C. 26 kg

D. 20 kg

219. A and B together can complete a work in 1.2 days,. A alone can complete it in 20 days. If B does the work only for half a day daily, then in how many days A and B together will complete the work ?
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A. 11 days

B. 15 days

C. 10 days

D. 20 days

220. The average of the two-digit numbers, which remain the same when the digits interchange their positions, is__________?
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A. 55

B. 44

C. 33

D. 66

Showing 201 to 220 of 238 mcqs