Questions from Mathematics

11. (a4 x a8)/a12 = ______________
(A) a20
(B) 1
(C) 12
(D) a-12
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12. (-1)25 + (-1)50 + (-1)75 = _________
(A) 75
(B) 150
(C) -1
(D) -2
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13. 125-⅓ X 625½ = _________
a) 125
b) 100
c) 25
d) 5
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14. 18+36÷9x6-5 = ?
a) 27
b) 37
c) 31
d) -4
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15. 2(5 x 3 - 7 ÷ 2 + 6) =
(Α) 35
(B) 40
(C) 45
(D) 25
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16. 16.16 ÷ 0.8 = ?
(A) 2.2
(B) 20.2
(C) 22
(D) 2.02
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17. The difference between compound and simple interests of a sum of money for two years at 4% per annum is Rs.20 find the sum.
(A) 2000
(B) 12500
(C) 10000
(D) 20,000
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18. A 180m long train crosses another 270 metre long train running in the opposite direction in 10.8 seconds. If the speed of the train is 60 km/hr. What is the speed of the second train in Km/hr?
(A) 80
(B) 90
(C) 150
(D) None of these
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19. A and B can do a piece of work in 10 days; B and C can do the same work in 20 days; and C and A can do the work in 10 days. In how many days will A,B and C finish the work together?
(A) 8 days
(B) 4 days
(C) 10 days
(D) 6 days
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20. 300 apples are distributed equally among a certain number of students. Had there been 10 more students, each would have received one apple less. Find the number of students?
(A) 70
(B) 40
(C) 55
(D) 50
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