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.
If W1 : W2 = 2 : 3 and W1 : W3= 1 : 2 then W2 : W3 is
#2. A group of 75 men are employed to lay down a railway line in 3 months. Due to certain emergency conditions, the work was to be finished in 18 days. How many more men should be employed to complete the work in the desired time ?
#3. The least number to be subtracted from 36798 to get a number which is exactly divisible by 78 is
When 36798 is divided by 78, remainder = 60
The least number to be subtracted = 60
#4. By selling an article for Rs 69, there is a loss of 8%, when the article is sold for Rs 78, the gain or loss per cent is :
#5. The value of 
is
#6. The compound interest on Rs 30000 at 7% per annum for a certain time is Rs 4347. The time is :
#7. A boat goes 20 km downstream in one hour and the same distance upstream in two hours. The speed of the boat in still water is :
#8. A man with 
of his usual speed reaches the destination 
hours late. Find his usual time to reach the destination .
#9. The wrong number of the sequence 4, 9, 19, 39, 79, 169, 319 is :
#10. 1 + 2 + 3 + … + 49 + 50 + 49 + 48 + … + 3 + 2 + 1 is equal to
#11. The middle term(s) of the following series 2 + 4 + 6 + … + 198 is
#12. Water tax is increased by 20% but its consumption is decreased by 20%. Then the increase or decrease in the expenditure of the money is :
#13. The ratio of the length of a school ground to its width is 5 : 2. If the width is 40 m, then the length is :
#14. In what ratio must a mixture of 30% alcohol strength be mixed with that of 50% alcohol strength so as to get a mixture of 45% alcohol strength ?
#15. If a boy walks from his house to school at the rate of 4 km per hour, he reaches the school 10 minutes earlier than the scheduled time. However, if he walks at the rate of 3 km per hour, then he reaches 10 minutes late. Find the distance of his school from his house :
#16. 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 :
#17. In what time will Rs 10000 amount to Rs 13310 at 20% per annum if compounded half yearly?
#18. A man bought 20 dozen eggs for Rs 720. What should be the selling price of each egg if he wants to make a profit of 20% ?
#19. The sum 5 + 6 + 7 + 8 + … + 19 is equal to
#20. Of the three numbers, the first number is twice the second and the second is thrice the third number. If the average of these 3 numbers is 20, then the sum of the largest and the smallest numbers is :
#21. The average age of 30 students is 9 years. If the age of their teacher is included, the average age becomes 10 years. The age of the teacher (in years) is:
#22. In one litre of a mixture of alcohol and water, water is 30%. The amount of alcohol that must be added to the mixture so that the part of water in the mixture becomes 15% is :
#23. A person who pays income tax at the rate of 4 paise per rupee, find that a fall of interest rate from 4% to 3.75% diminishes his net yearly income by Rs 48. What is his capital?
#24. A shopkeeper sold his goods at half the list price and thus lost 20%. If he had sold on the listed price, his gain percentage would be.
#25. The simplified value of 
is
#26. Find out the wrong number in the sequence 169, 144, 121, 100, 82, 64, 49
#27. A can cultivate 
th of a land in 6 days and B can cultivate 
rd of the same land in 10 days. Working together A and B can cultivate 
th of the land in :
#28. A train travels 500 m in first minute. In the next 4 minutes, in each minute it travels 125 m more than that in the previous minute. The average speed per hour of the train during those 5 minutes will be :
#29. If the price of a commodity is increased by 50%, by what fraction must its consumption be reduced so as to keep the same expenditure on its consumption?
#30. A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is :
#31. A’s salary is 50% more than that of B. How much per cent is B’s salary less than that of A?
#32. If A and B are in the ratio 4 : 5 and the difference of their squares is 81, what is the value of A?
#33. 
…….. is equal to
#34. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, then how far is the place?
#35. 
is equal to
#36. The LCM of two numbers is 1920 and their HCF is 16. If one of the number is 128, find the other number.
#37. A and B can complete a piece of work in 8 days, B and C can do it in 12 days, C and A can do it in 8 days. A, B and C together can complete it in :
#38. 15 litres of a mixture contains alcohol and water in the ratio 1 : 4. If 3 litres of water is mixed in it, the percentage of alcohol in the new mixture will be
#39. Find the simplest value of 
(given
#40. A man rows down a river 15 km in 3 hours with the stream and returns in 
hours. The rate at which he swims 26 km downstream is :
#41. The ratio of the fifth and sixth terms of the sequence 1, 3, 6, 10, … is
#42. Two trains start at the same time from Aligarh and Delhi and proceed towards each other at the rate of 14 km and 21 km per hour respectively. When they meet, it is found that one train has travelled 70 km more than the other. The distance between the two stations is :
#43. The average of 15 numbers is 7. If the average of the first 8 numbers be 6.5 and the average of last 8 numbers be 9.5, then the middle number is :
#44. Krishnan bought a camera and paid 20% less than its original price. He sold it at 40% profit on the price he had paid. The percentage of profit earned by Krishnan on the original price was :
#45. The simplification of 
up to three places of decimals yields
#46. 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.
#47. The average weight of the first 11 persons among 12 persons is 95 kg. The weight of 12th person is 33 kg more than the average weight of all the 12 persons. The weight of the 12th person is :
#48. By selling an article for Rs 102, there is a loss of 15%, when the article is sold for Rs 134.40. The net result in the transaction is
#49. Find the sum of the first five terms of the following series.
+………+…….
#50. The first odd number is 1, the second odd number is 3, the third odd number is 5 and so on. The 200th odd number is :
