## WEBSITE AND DATABASE FOR SALE

Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. A man sells two wrist watches at Rs. 594 each on one he gains 10% and in other looses 10% Find his gain or loss percent on the whole.
Q2. The average marks of 5 students is 76, 8 students is 77 then find the average marks of the class?
Q3. The average age of a class of 37 students is 15 years. If one student removed the average decreased by 1 month then finds the age of removed student?
Q4. The average of first nine prime numbers is.....
Q5. The average of five numbers is 27 if one number is included the average becomes 25. The included number is....
Q6. A shopkeeper allows a discount of 10% on the marked price of a camera which costs him Rs. 600 to make a profit of 20% should be
Q7. The average of first 40 even natural numbers is....
Q8. The average of 1, 8, 27, 64, 125 is ......
Q9. The average of 28, 19, y, 30, 28 is 25 then find the value of y?
Q10. The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of girls is 15.4 years. The ratio or the number of boys to the number of girls in the class is.....
Q11. LCM of prime numbers is....
Q12. Find the greatest four digits number which is divisible by 15, 18, 25?
Q13. Find the LCM of (22 x 33 x 5 x 72, 22 x 3 x 52 x 7, 2 x 3 x 53 x 7 x 11)
Q14. If 3/5 = y/8 then (x+5) : (y+5) is equal to......
Q15. ½ is what percent of ¼?
Q16. Two fold ratio of 1:8 is .....
Q17. If the average of 4137 numbers is 1500 then every number is decreased by 20% then find the new average?
Q18. Standard deviation of "n" consecutive even integers is....
Q19. Three coins are tossed simultaneously find the probability exactly two tails turn up…
Q20. One-Fourths of a herd of camels was seen in the forest. Twice the square root of the number of herd had gone to mountains and the remaining 15 camels were seen on the bank of a river. Find the total number of camels.
Q21. Which of the greatest value?
Q22. Which degit comes on 10th place in 12345678911234567898?
Q23. A tap can fill a tank in 30 minutes another tap can empty the tank in 12 minutes if two taps are opened together now many minutes will take for fill for the tank?
Q24. A number is increased by 10% decreased by 10% and increased by 20%, the value is 11.88 then find that number?
Q25. Two numbers are in the ratio 2:3 if first number increased by 50% and second number decreased by 10% then new ratio will be 10:9, find sum of these numbers?
Q26. A, B and C can complete a piece of work in 24, 6 and 12 days respectively. If they work together in how many days they will complete the same work?
Q27. The length of side of a rhombus is 5 m and one of its diagonal is 8m. Then what is the length of other diagonal?
Q28. 12 men complete the 2400sq.m ploughing work in 10 days. How many men are required to complete 3600sq.m ploughing work in 18 days?
Q29. The length of a chain used as the boundary of a semicircular park is 72m. What is the area of the park?
Q30. Find the range of the following data : 25, 67, 78, 43, 21, 17, 49, 54, 76, 92, 20, 45, 86, 37, 35
Q31. 7 men can complete a work in 52 days. In how many days will 13 men finish the same work?
Q32. The average of 4 values is 20 and when a quantity is added to each value the average is 22 find the quantity.
Q33. If x + 1/x = 2, find the value of x3 + 1/x3?
Q34. Find the H.C.F of 4/9, 2/5, 6/8, 2/5?
Q35. Find the principal that yield a compound interest of Rs. 1632 in 2 years and 4% rate of interest per annum.
Q36. What percent is 20 paise of 5 rupees 80 paise?
Q37. If Rs. 782 be divided into three parts, proportional to 1/2.2/3.3/4 then first part is
Q38. Probability of sure and impossible events.
Q39. The ratio of area of 2 squares is 9:1 then ratio of the perimeter is .....
Q40. The seventh term in the series 2, 6, 12, 20, 30,....
Q41. The L.C.M of 1/3, 5/6, 2/9, 4/27 is .....
Q42. The cost price of a cow is Rs. 6000. What is the selling price in order to make a profit of 30%?
Q43. ……………is the binary equivalent of (12)10
Q44. The mean of first five prime numbers is
Q45. If the arithmetic mean of 7, 5, 13, x and a be 10, then the value of x is …
Q46. Which is largest among 28%, 2.8%, 2/9 and 0.25
Q47. If (3x+2y) : (3x-2y) =5:2, then x:y is….
Q48. If 8-5x4 = 44 and 15-3x3 = 48 then 16-4x5 = ?
Q49. The price of a house is decreased from Rs. 15 Lakhs to Rs. 12 Lakhs. Find the percentage of decrease.
Q50. Rajesh buys a pen for Rs. 80 and sells it to his friend If he wants to make a profit of 5% what price for which he would have sold?