basic maths MCQs – Page 5

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?
comments icon0
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________?
comments icon0
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?
comments icon0

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?
comments icon0

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__________?
comments icon0
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.
comments icon0

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?
comments icon0
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___________?
comments icon0
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?
comments icon0

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.
comments icon0
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___________?
comments icon0

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?
comments icon0
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_______?
comments icon0

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__________________?
comments icon0

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?
comments icon0
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?
comments icon0

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.
comments icon0

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___________?
comments icon0

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 ?
comments icon0

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__________?
comments icon0
A. 55

B. 44

C. 33

D. 66

221. Find the average of all the numbers between 6 and 34 which are divisible by 5.
comments icon0
A. 20

B. 18

C. 30

D. 24

222. The average salary of a person for the months of January, February, March and April is Rs.8000 and that for the months February, March, April and May is Rs.8500. If his salary for the month of May is Rs.6500, find his salary for the month of January?
comments icon0

A. 2500

B. 4500

C. 5000

D. 3000

223. Five years ago the average of the ages of A and B was 40 years and now the average of the ages of B and C is 48 years. What will be the age of the B ten years hence?
comments icon0

A. 56 years

B. 58 years

C. 55 years

D. Data inadequate
224. A man purchased 3 blankets @ Rs.100 each, 5 blankets @ Rs.150 each and two blankets at a certain rate which is now slipped off from his memory. But he remembers that the average price of the blankets was Rs.150. Find the unknown rate of two blankets?
comments icon0

A. Rs.250

B. Rs.150

C. None

D. Rs.225

225. A man can row three-quarters of a kilometre against the stream in 11 minutes and down the stream in 7 minutes. The speed (in km/hr) of the man in still water is:_________?
comments icon0

A. 2

B. 3

C. 5

D. 4

226. The average age of a husband and a wife is 23 years when they were married five years ago but now the average age of the husband, wife and child is 20 years(the child was born during the interval). What is the present age of the child?
comments icon0

A. 3 years

B. 1 year

C. 2 years

D. 4 years
227. The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is____________?
comments icon0

A. 15 years

B. 15 2/7 years

C. 14 years

D. 11 years
228. The average age of a husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is___________?
comments icon0
A. 40 years

B. 30 years

C. 35 years

D. None of these

229. A and B working separately can do a piece of work in 9 and 12 days respectively. If they work for a day alternately. If A begins first, in how many days the work will be completed ?
comments icon0
A. 41/4 days

B. 42/4 days

C. None of these

D. 55 days

230. P is 30% more efficient than Q. P can complete a work in 23 days. If P and Q work together, how much time will it take to complete the same work?
comments icon0

A. 9

B. 13

C. 23

D. 11

231. A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current?
comments icon0

A. 3 kmph

B. 6.5 kmph

C. 13 kmph

D. 1.5 kmph
232. A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in___________?
comments icon0

A. 8 days

B. 15 days

C. 12 days

D. 10 days

233. The speed of a motor boat is that of the current of water as 36:5. The boat goes along with the current in 5 hours 10 min, it will come back in_______?
comments icon0

A. 12 hours 10 min

B. 6 hours

C. 5 hours 50 min

D. 6 hours 50 min
234. A pupils marks were wrongly entered as 83 instead of 63. Due to the average marks for the class got increased by half. The number of pupils in the class is___________?
comments icon0

A. 10

B. 73

C. 20

D. 40
235. In an examination a pupils average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?
comments icon0

A. 10

B. 9

C. 8

D. 11
236. P and Q can do a work in 30 days. Q and R can do the same work in 24 days and R and P in 20 days. They started the work together, but Q and R left after 10 days. How many days more will P take to finish the work?
comments icon0

A. 8

B. 18

C. 19

D. 10

237. A boat is rowed downstream at 15.5km/hr and upstream at 8.5 km/hr. The speed of the stream is________?
comments icon0

A. 5.75km/hr

B. 6.5km/hr

C. 7km/hr

D. 3.5km/hr
238. The average marks in mathematics scored by the students of a school at the public examination were 39. If four of these students who actually scored 5, 12, 15 and 19 marks at the examination had not been sent up, the average marks for the school would have been 44. Find the number of students sent up for examination from the school?
comments icon0

A. 30

B. 25

C. 20

D. 32