Mathematics Quiz For RRB NTPC : 25th December

Q1. What should be the average speed of a car to cover a distance of 189 km in 3.5 hours?
(a) 15 m/s
(b) 54 m/s
(c) 27 m/s
(d) 30 m/s

Q2. What will be the 40% of a number whose 200 per cent is 90?
(a) 18
(b) 45
(c) 16
(d) 36

Q3. The centroid of a triangle is the point where
(a) the medians meet
(b) the altitudes meet
(c) the right bisectors of the sides of the triangle meet
(d) the bisectors of the angles of the triangle meet

Q4. In a trapezium ABCD, AB || CD, AB < CD, CD = 6 cm and distance between the parallel sides is 4 cm. If the area of ABCD is 16 cm2, then AB is
(a) 1 cm
(b) 2 cm
(c) 3 cm
(d) 8 cm

Q5. The simple interest on a sum for 5 years is two-fifth of the sum. The rate of interest per annum is:
(a) 1
(b) 8
(c) 6
(d) 4

Q6. If a – b = 3 and a2 + b2 = 25, then the value of ab is:
(a) 16
(b) 8
(c) 10
(d) 15

Q7. The selling price of an article is th of its cost price. Then the gain percentage is
(a) 20%
(b) 28%
(c) 60%
(d) 68%

Q8. How much simple interest will Rs. 4000 earn in 18 months at 12% per annum?
(a) Rs. 216
(b) Rs. 360
(c) Rs. 720
(d) Rs. 960

Q9. 30% of A’s salary is equal to 20% of of B’s salary. If B’s salary is Rs. 2400, then what is A’s salary?
(a) Rs. 1,880
(b) Rs. 1,000
(c) Rs. 2,160
(d) Rs. 960

Q10. If Sinθ = and 0° < θ < 90°, then the value of tan (θ – 15°) is:

Solutions:

 

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