Mathematics Quiz For RRB NTPC : 4th December

Q1. Present ages of Radha and sudha are in the ratio of 7 : 9 respectively. Five years ago ratio of their ages was 3 : 4. What will be Sudha’s age after 3 years from now?
(a) 48 years
(b) 42 years
(c) 43 years
(d) 38 years

Q2.Two pipes A and B can fill a tank in 20 minutes and 30 minutes respectively, If both pipes are opened together, the time taken to fill the tank is :
(1) 50 minutes
(2) 12 minutes
(3) 25 minutes
(4) 15 minutes

Q3.The LCM of two numbers is 864 and their HCF is 144. If one of the numbers is 288, the other number is :
(1) 576
(2) 1296
(3) 432
(4) 144

Q4.If 50% of (x – y) = 20% of (x + y), then what percent of x is y?
(a) 250/7 %
(b) 300/7 %
(c) 150/7 %
(d) 42%

Q5.In a school 70% of the students are girls. The number of boys are 510. Then the total number of students in the school is:
(a) 850
(b) 1700
(c) 1830
(d) 2000

Q6. 0.6 of a number is equal to 0.08 of another number. The ratio of the numbers will be:
(1) 3 : 4
(2) 4 : 3
(3) 2 : 15
(4) 2 : 9

Q7.Two number differ by 5. If their product is 336, the sum of the two number is :
(1) 21
(2) 28
(3) 37
(4) 51

Q8.A number, when divided by 65 gives the remainder 43. If it is divided by 13, the remainder will be.
(a) 1
(b) 4
(c) 6
(d) 9

Q9.If A : B = 3 : 4 and B : C = 8 : 9, then the ratio A : B : c is.
(1). 3:4:5
(2). 1:2:3
(3). 7:12:17
(4). 6:8:9

Q10. Two numbers are in the ratio 5:6.If their LCM is 120 ,their HCF will be
(1). 12
(2). 10
(3). 8
(4). 4

Solutions:

  

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