SAT Sample Questions » Quantitative Section : Quantitative Ability

SAT Sample Questions

Quantitative Section : Quantitative Ability

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31. A and B working together can finish a job in T days. If A works alone and completes the job, he will take T + 5 days. If B works alone and completes the same job, he will take T + 45 days. What is T?
    1. 25
    2. 60
    3. 15
    4. None of these

    Answer: C

32. A man can do a piece of work in 60 hours. If he takes his son with him and both work together then the work is finished in 40 hours. How long will the son take to do the same job, if he worked alone on the job?
    1. 20 hours
    2. 120 hours
    3. 24 hours
    4. None of these

    Answer: B

33. A, B and C can do a work in 5 days, 10 days and 15 days respectively. They started together to do the work but after 2 days A and B left. C did the remaining work (in days)
    1. 1
    2. 3
    3. 5
    4. 4

    Answer: D

34. X alone can do a piece of work in 15 days and Y alone can do it in 10 days. X and Y undertook to do it for Rs. 720. With the help of Z they finished it in 5 days. How much is paid to Z?
    1. Rs. 360
    2. Rs. 120
    3. Rs. 240
    4. Rs. 300

    Answer: B

35. Ram starts working on a job and works on it for 12 days and completes 40% of the work. To help him complete the work, he employs Ravi and together they work for another 12 days and the work gets completed. How much more efficient is Ram than Ravi?
    1. 50%
    2. 200%
    3. 60%
    4. 100%

    Answer: D

36. The average weight of a class of 24 students is 36 years. When the weight of the teacher is also included, the average weight increases by 1kg. What is the weight of the teacher?
    1. 60 kgs
    2. 61 kgs
    3. 37 kgs
    4. None of these

    Answer: B

37. The average of 5 quantities is 10 and the average of 3 of them is 9. What is the average of the remaining 2?
    1. 11
    2. 12
    3. 11.5
    4. 12.5

    Answer: C

38. The average age of a family of 5 members is 20 years. If the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member?
    1. 13.5
    2. 14
    3. 15
    4. 12.5

    Answer: D

39. A student finds the average of 10 positive integers. Each integer contains two digits. By mistake, the boy interchanges the digits of one number say ba for ab. Due to this, the average becomes 1.8 less than the previous one. What was the difference of the two digits a and b?
    1. 8
    2. 6
    3. 2
    4. 4

    Answer: C

40. Average cost of 5 apples and 4 mangoes is Rs. 36. The average cost of 7 apples and 8 mangoes is Rs. 48. Find the total cost of 24 apples and 24 mangoes.
    1. 1044
    2. 2088
    3. 720
    4. 324

    Answer: B