Mathematics Quiz For RRB NTPC : 13th January 2020 of Simple interest, ratio and Percentage

Q1. In an election a candidate got 62% vote and won by 144 votes. How many votes did the winning candidate get (Assume that there are only two participants)?
(a) 278
(b) 372
(c) 398
(d) 405

Q2. How much distance will the 500 rounds of a wheel of 1.26m diameter, cover?
(a) 650 m.
(b)1570 m.
(c) 1980 m.
(d) 3960 m.

Q3. of a number is subtracted from 7/3 of the same number, then the result will be 2 more than the number. What is that number?
(a) 42
(b) 21
(c) 9
(d) 3

Q4. If Rs. 1200 at simple interest amounts to Rs. 1440 in 4 years, then what is the annual rate of interest?
(a) 12%
(b)11%
(c) 6%
(d) 5%

Q5. 120% of 5100 = ?
(a) 6120
(b) 8000
(c) 10, 000
(d) 4, 000

Q7. If a train, 150 m. long crosses a pole in 12 seconds, then what is the speed of the train in km./hr.?
(a) 45
(b) 60
(c) 50
(d) 75

Q8. What will be 25% of 25 ?
(a) 6.25
(b) 0.0625
(c) 0.625
(d) 0.00625

Q9. If a + b = 5, a – b = 3 then a2 – b2 is equal to-
(a) 10
(b) 11
(c) 4
(d) 15

Q10. If A : B = 2 : 3 and B : C = 4 : 5, then C : A will be equal to-
(a) 15 : 8
(b) 12 : 10
(c) 8 : 5
(d) 8 : 15

Solution: