Mathematics Quiz For RRB NTPC : 9th January 2020

Q1. If A is equal to 20% of B and B is equal to 25% of C; then what percent of C is A?
(a) 10
(b) 15
(c) 5
(d) 20

Q2. A gun is fired at a distance of 1.7 km from Ram and he hears the sound after 25 seconds. The speed of sound in meter per second is:
(a) 60
(b) 62
(c) 64
(d) 68

Q3. A sum of Rs. 3000 yields an interest of Rs. 1080 at 12% per annum simple interest in how many years?
(a) 4 Years
(b) 3 Years
(c) 5 years
(d) 2 1/2 years

Q4. The area of the largest triangle that can be inscribed in a semicircle of radius 6m is:
(a) 36 m2
(b) 72 m2
(c) 18 m2
(d) 12 m2

Q5. Three numbers are in the ratio 5:7:12. If the sum of the first and the third is greater than the second by 50.The sum of the three numbers is:
(a) 125
(b) 120
(c) 95
(d) 85

Q6. If the income of Mohan is 150% higher than Mahesh, then by what percent the income of Mahesh is less than Mohan?
(a) 40%
(b) 50%
(c) 60%
(d) 45%

Q7. If ∆PQR and ∆LMN are similar and 3PQ = LM and MN = 9 cm, then QR is equal to:
(a) 12 cm
(b) 6 cm
(c) 9 cm
(d) 3 cm

Q8. Possible length of the three sides of a triangle are:-
(a) 2 cm, 3 cm, 6 cm
(b) 3 cm, 4 cm, 5 cm
(c) 2.5 cm, 3.5 cm, 6 cm
(d) 4 cm, 4 cm, 9 cm

Q9. A can do a work in 12 days while B can do it in 15 days. They undertake to complete it together for Rs. 450. what will be the share of A in this amount of money?
(a) Rs. 200
(b) Rs. 240
(c) Rs. 250
(d) Rs. 300

Q10. 36 men together can build a wall 140 m long in 21 days; the number of men working at the same rate required to build the same wall in 14 days is?
(a) 54
(b) 48
(c) 36
(d) 18