Quantitative Reasoning

Q: If the integer a is a multiple of 6, the integer b is a multiple of 3, and a>b>0, then which of the following integers must be a2 – b2 multiple of?

(a) :  6
(b) :  8
(c) :  9
(d) :  10
(e) :  12
Answer:  9
Explanation:  

Q: If 6 men can complete a work in 15 hours. Then 10 men, working on the same speed, will complete the same work in _________ hours.

(a) :  7
(b) :  8
(c) :  9
(d) :  10
(e) :  None of these
Answer:  9
Explanation:  

Q: The ages of A, B and C are 17, 16 and 12 respectively. If the age of D also included the average of the ages is increased by 5. What is the age of D?

(a) :  35
(b) :  25
(c) :  45
(d) :  55
(e) :  non of these
Answer:  35
Explanation:  

Q: Machine P can print one lakh books in 8 hours. Machine Q can print the same number of books in 10 hours while machine R can print the same in 12 hours. All the machines started printing at 9 A.M. Machine P is stopped at 11 A.M. and the remaining two machines complete work. Approximately at what time will the printing of one lakh books be completed?

(a) :  0.625
(b) :  0.5833333333333334
(c) :  0.5416666666666666
(d) :  0.4583333333333333
(e) :  non of these
Answer:  0.5416666666666666
Explanation:  

Q: The sum of all prime numbers between 60 and 90 is:

(a) :  373
(b) :  473
(c) :  523
(d) :  615
(e) :  non of these
Answer:  523
Explanation:  

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