# Mathematics Quiz For RRB NTPC : 6th December

Q1.At what percent per annum will Rs. 3000/ – amount to Rs. 3993 in 3 years if the interest is compounded annually?
(a) 9%
(b) 10%
(c) 11%
(d) 13%

Q2.The average of 12, 22, 32, 42, 52, 62, 72, 82, 92,102 is –
(A) 48
(B) 57
(C) 38
(D) 48.5

Q3.Rs. 68000 is divided among A, B and C in the ratio of 1/2 ∶ 1/4 ∶ 5/16 , The difference of the greatest and the smallest part is :
(a) Rs. 6000
(b) Rs. 14440
(c) Rs. 9200
(d) Rs. 16000

Q4.Determine the selling price (in rupees) if the list price is Rs. 1,000 and the two successive discounts are 30% and 20%.
(a) 700
(b) 140
(c) 560
(d) 600

Q5.The ratio of three numbers is 2 : 3 : 5 and their product is 10290. The numbers respectively are
(a) 35, 21, 14
(b) 21, 14, 35
(c) 14, 21, 35
(d) 14, 35, 21

Q6. If 24 men completes a work in 18 days working 8 h a day, in how many days will 36 men complete the same work working 12 h a day?
(a) 6
(b) 8
(c) 10
(d) 12

Q7. In a school, 10% of the boys are same in numbers as 1/4th of the girls. What is the ratio of boys to girls in that school?
(a) 3 : 2
(b) 5 : 2
(c) 2 : 1
(d) 4 : 3

Q8. Ratio of the principal and the amount after 1 year is 10 : 12. Then the rate of interest per annum is:
(a) 12%
(b) 16%
(c) 18%
(d) 20%

Q9. Two numbers are in the ratio 3 : 5. If each number is increased by 10, then ratio becomes 5 : 7. The smaller number is
(a) 9
(b) 12
(c) 15
(d) 25

Q10. A number is increased by 10% and then it is decreased by 10%. The net changed in the number is
(a) no increase or decrease
(b) 2% decrease
(c) 1% increase
(d) 1% decrease

Soluions:

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