Quantitative Aptitude Questions with answers and Solutions for SSC CPO- SI in CPMF Exam. Maths MCQs Mock Test for free online practice of SI CAPF Exam.
Practice Set : Mathematics (Quantitative Aptitude)
Questions : 50
Medium : English
Level : SSC CPO SI Exam
All Type and topic MCQs – Solved by short tricks
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#1. Out of seven given numbers, the average of the first four numbers is 4 and that of the last four numbers is also 4. If the average of all the seven numbers is 3, then the fourth number is :
#2. A 200 metre long train is running at a speed of 72 km/hr. How long will it take to cross 800 metre long bridge?
#3. If the mean of 4 observations is 20, when a constant ‘C’ is added to each observation, the mean becomes 22. The value of C is
#4. If in a sale, the discount given on a saree is equal to one-fourth the marked price and the loss due to this discount is 15%, then the ratio of the cost price to the selling price is :
#5. An article marked as Rs 800 is offered at Rs 736 in the off season. The rate of discount offered is :
#6. The greatest among the following numbers 
is
#7. The greatest value among the fractions 
#8. A and B can do a piece of work in 28 and 35 days respectively. They began to work together but A leaves after sometime and B completed the remaining work in 17 days. After how many days did A leave?
#9. If 28 men complete 
of a piece of work in a week, then the number of men, who must be engaged to get the remaining work completed in another week, is :
#10. In an examination there are three subjects of 100 marks each. A student scores 60% in the first subject and 80% in the second subject. He scored 70% in aggregate. His percentage of marks in the third subject is :
#11. The difference between compound and simple interest on a certain sum for 3 years at 5% per annum is Rs 122. The sum is :
#12. The mean value of 20 observations was found to be 75, but later on it was detected that 97 was misread as 79. Find the correct mean.
#13. The average of six numbers is 32. If each of the first three numbers is increased by 2 and each of the remaining three numbers is decreased by 4, then the new average is :
#14. In a school 
of the boys are same in number as 
of the girls and 
of the girls are same in number as of the boys. The ratio of the boys to girls in that school is :
#15. A sum of Rs 10,000 lent partly at 8% and remaining at 10% per annum. If the yearly interest on the average is 9.2%, the two parts are :
#16. Which of the following number is the greatest of all? 
#17. Sunil completes a work in 4 days, whereas Dinesh completes the work in 6 days. Ramesh works 
times as fast as Sunil. The three together can complete the work in :
#18. If the price of petrol be raised by 20%, then the percentage by which a car owner must reduce his consumption so as not to increase his expenditure on petrol is :
#19. The least number, which is to be added to the greatest number of 4 digits so that the sum may be divisible by 345 is :
#20. 
is equal to
#21. On selling an article for Rs 105 a trader loses 9%. To gain 30% he should sell the article at
#22. A man travels for 5 hours 15 minutes. If he covers the first half of the journey at 60 km/h and rest at 45 km/h. Find the total distance travelled by him.
#23. In what time will Rs 10000 amount to Rs 13310 at 20% per annum if compounded half yearly?
#24. The middle term(s) of the following series 2 + 4 + 6 + … + 198 is
#25. A tap can fill a cistern in 40 minutes and a second tap can empty the filled cistern in 60 minutes. By mistake without closing the second tap, the first tap was opened. In how many minutes will the empty cistern be filled?
#26. The average of the largest and smallest 3 digit numbers formed by 0, 2 and 4 would be
#27. The sum 5 + 6 + 7 + 8 + … + 19 is equal to
#28. A store offe Rs a variety of discounts that range between 20% and 25% inclusive. If a book is discounted to a price of Rs 270, then its greatest possible original price was :
#29. When a particular number is subtracted from each of 7, 9, 11 and 15, the resulting numbers are in proportion. The number to be subtracted is :
#30. A cistern has two pipes. One can fill it with water in 8 hours and other can empty it in 5 hours. In how many hours will the cistern be emptied if both the pipes are opened together when 
of the cistern is already full of water?
#31. In an examination, 52% students failed in Hindi and 42% in English. If 17% failed in both the subjects, what percentage of students passed in both the subjects?
#32. The next number of the sequence 2, 5, 10, 14, 18, 23, 26, 32 … is
#33. If 2 + x
=
then the simplest value of x is :
#34. If there is a profit of 20% on the cost price, the percentage of profit on the sale price is :
#35. The average pocket money of 3 friends A, B, C is Rs. 80 in a particular month. If B spends double and C spends triple of what A spends during that month and if the average of their unspent pocket money is Rs. 60, then A spends (in Rs.)
#36. A table with marked price Rs 1200 was sold to a customer for Rs 1100. Find the rate of discount allowed on the table.
#37. The rate of simple interest per annum of bank being decreased from 5% to
% the annual income of a person from interest was less by Rs 105. The sum deposited at the bank was :
#38. Divide 50 into two parts so that the sum of their reciprocals is 
#39. A tap can fill a cistern in 8 hours and another tap can empty it in 16 hours. If both the taps are open, the time (in hours) taken to fill the tank will be :
#40. Two numbers are in the ratio 2: 3. If 20% of the smaller number added to 20 is equal to the sum of 10% of the larger number and 25, then the smaller number is :
#41. Find the largest number of four digits such that on dividing by 15,18, 21 and 24 the remainders are 11, 14, 17 and 20 respectively.
#42. The list price of a clock is Rs 160. A customer buys it for Rs 122.40 after two successive discounts. If first discount is 10%, the second is ?
#43. Which of the following is the largest fraction?
#44. At what per cent per annum will Rs 3000 amounts to Rs 3993 in 3 years if the interest is compounded annually?
#45. Find the value of
52 + 62 +72 … + 102
#46. The average of five numbers is 7. When three new numbers are included, the average of the eight numbers becomes 8.5. The average of three new numbers is :
#47. Given that 12 + 22 + 32 + … + 202 = 2870. Then the value of (22 + 42 + 62 + … + 402 ) is :
#48. A worker suffers a 20% cut in his wages. He may regain his original wages by obtaining a rise of
#49. Three numbers are in the ratio 1 : 2 : 3 and their HCF is 12. The numbers are
Numbers = x , 2 x and 3 x (let)
Their HCF = x = 12
Numbers = 12, 24 and 36
#50. The sum of a natural number and its square equals the product of the first three prime numbers. The number is
