# Mathematics Quiz For RRB NTPC : 24th December

Q1. A and B can together do a piece of work in 6 days and A alone can do it in 9 days. The number of days B will take to do it alone is?
(a) 18 days
(b) 24 days
(c) 9 days
(d) 12 days

Q2. A man can row upstream at 12 km/hr and downstream at 18 km/hr. The man’s rowing speed in still water is?
(a) 15 km/hr
(b) 5 km/hr
(c) 3 km/hr
(d) 10 km/hr

Q3. If 8% of a number is added to it, the result is 810 what is that number?
(a) 700
(b) 750
(c) 722
(d) 745

Q4. Which amongst the following is less than 1/5?

Q5. A profit of Rs. 960 is divided between A and B in the ratio 1/3:1/2. The difference of their profit is:
(a) Rs. 120
(b) Rs. 160
(c) Rs. 192
(d) Rs. 240

Q6. How much time will be taken by a train 100 metres long to cross a pole at the speed of 40 km/hr.?

Q7. A chord of length 16 cm is drawn in a circle of radius 10 cm. The distance of the chord from the centre of the circle is:
(a) 8 cm
(b) 6 cm
(c) 4 cm
(d) 12 cm

Q8. If in ∆ABC, DE||BC, AB = 7.5cm, BD = 6cm and DE = 2cm, then the length of BC in cm is:
(a) 6
(b) 8
(c) 10
(d) 10.5

Q9.
(a) 200
(b) 450
(c) 250
(d) 350

Q10. In a city, 40% of the people are poor. If total population of city is 30,000 then find the number of rich people.
(a) 20000
(b) 18000
(c) 12000
(d) 12500

Solutions:

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