Mathematics Quiz For RRB NTPC : 28th December

Q1. If 10 people can do a job in 20 days, then 20 people with twice the efficiency can do the same job in
(a) 5 days
(b) 10 days
(c) 20 days
(d) 40 days

Q2. Two consecutive discounts x% and y% is equivalent to the discount

Q3. A box of sweets was distributed between A and B in the ratio 3 : 4. If A got 36 sweets, what was the total no. of sweets
(a) 12
(b) 84
(c) 144
(d) 27

Q4. If the ratio of cost price and selling price is 4 : 5, then the percentage of profit will be
(a) 20
(b) 0.1
(c) 10
(d) 25

Q5. In the fig ∆ABC is inscribed in a circle with centre O. If ∠ABC = 30° then ∠ACB is equal to

(a) 30°
(b) 60°
(c) 50°
(d) 90°

Q6. The value of cos2 20° + cos2 70° is:

Q7. Rs. 782 is divided into 3 parts in the ratio the first part is:
(a) Rs. 182
(b) Rs. 204
(c) Rs. 190
(d) Rs. 196

Q8. A spherical lead ball of radius 6 cm is melted and small lead balls of radius 3 mm are made. The total number of possible small lead balls is
(a) 4250
(b) 4000
(c) 8005
(d) 8000

Q9. The four sides of a quadrilateral are in the ratio of 2:3:4:5 and its perimeter is 280m. The length of the longest side is:
(a) 100m
(b) 150m
(c) 175m
(d) 180m

Q10. A train 100 m long is running at a speed of 120 kms/hr. The time taken to pass a person standing near the line is
(a) 1 second
(b) 3 seconds
(c) 5 seconds
(d) 7 seconds

Solutions: