# Mathematics Quiz For RRB NTPC : 3rd December

Q1. 66 cubic centimeters of silver is drawn into a wire 1 mm in diameter. The length of the wire in meters will be:
(a) 84
(b) 90
(c) 168
(d) 336

Q2. A, B and C can complete a piece of work in 24,6 and 12 days respectively. Working together, they will complete the same work in:
(a) 1/24 days
(b) 7/24 days
(d) 4 days

Q3. Raju age after 15 years will be 5 times his age 5 years back, what is the present age of Raju
(a) 15
(b) 14
(c) 10
(d) 8

Q4.The LCM of two multiples of 12 is 1056. If one of the numbers is 132, the other number is
(a) 12
(b) 72
(c) 96
(d) 132

Q5.If cos 2x = cos 60° cos 30° + sin 60° sin 30°, then x is :
(a) 10°
(b) 15°
(c) 30°
(d) 45°

Q6.From 125 metre high towers, the angle of depression of a car is 45°. Then how far the car is from the tower?
(a) 125 metre
(b) 60 metre
(c) 75 metre
(d) 95 metre

Q7.40 litres of a mixture of milk and water contains 10% of water, the water to be added, to make the water content 20% in the new mixture is :
(a) 6 litres
(b) 6.5 litres
(c) 5.5 litres
(d) 5 litres

Q8.The present age of A is 9 times the present age of B. 3 years hence A’s age will be 5 times that of B. Find the present ages of A.
(a) 25
(b) 23
(c) 19
(d) 27

Q9.If Rs. 5,000 becomes Rs. 5,700 in a year’s time, what will Rs. 7,000 become at the end of 5 years at the same rate of simple interest?
(1) Rs.10, 500
(2) Rs. 11, 900
(3) Rs. 12, 700
(4) Rs. 7,700

Q10.If a dining table with marked price Rs. 6,000 was sold to a customer for Rs. 5, 500, then the rate of discount allowed on the table is
(a) 10%
(b) 8%
(c) 8(1/3)%
(d) 9%

Solutions:

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