RRB-NTPC 2016 Mathematics

Practice subject-wise previous year questions

Question 751

Question 752

Question 753

Question 754

Question 755

Question 756

Question 757

Question 758

Question 759

Question 760

Question 761

Question 762

Question 763

Question 764

Question 765

1.1% decrease

1.1% increase

Question 766

Question 767

Question 768

Question 769

Question 770

increase of 10.4%

decrease of 10.6%

decrease of 9.6%

increase of 11.6%

Question 771

Question 772

Question 773

Question 774

₹2,613 deficit

₹2,613 surplus

₹1,975 deficit

₹1,245 surplus

Question 775

A and B can do a piece of work in 12 days and 20 days, respectively. Both work for 3 days and then A leaves. How long (in days) will B take to complete the remaining work?

The ratio of land to water for Earth as a whole is 1:3, and it is 2:5 in the Northern hemisphere. If the areas of the Northern and the Southern hemispheres are equal, then the ratio of land to water in the Southern hemisphere is:

The total surface area of a cube having side 64 cm is:

Four years ago, Ravi was thrice as old as Kaviraj. At present, Ravi is twice as old as Kaviraj. Find Ravi's age at present.

Find the compound interest on ₹25,600 at the rate of \(12\tfrac12\) % interest per annum for 2 years 3 months, compounded annually.

A family increases its monthly income by 10% but their monthly expenditure rises by 20%. If their original monthly income was ₹45,000 and monthly expenditure was ₹36,000, what is the new monthly savings after the increase?

An article is sold at a profit of 20%. If the selling price is reduced by 10%, what will be the profit percentage?

The shadow of a tower increases by 20 m when the sun's altitude changes from 60 \(^\circ\) &nbsp;to 45 \(^\circ\) . Find the length (rounded off to one decimal place, in m) of the tower.&nbsp; (Use&nbsp; \(\sqrt3 = 1.7\) )

The LCM of the numbers 3, 7.2 and 0.64 is:

If a sum is invested at a simple interest rate of 8% per annum for 9 months to earn an interest of ₹18,000, what was the principal amount invested?

Pipes C and D can fill a tank of 3,000 litres in 6 hours and 4 hours, respectively. Working together, how many hours will they take to fill a 6,000-litre tank?

ABCD is a quadrilateral in which AB \(\parallel\) DC, and E and F are the mid points of the diagonals AC and BD, respectively. If AB = 23 cm, BC = 91 cm, DC = 35 cm, and AD = 62 cm, then what is the length (in cm) of EF?

A man covers a certain distance by train. Had the train moved 14 km/hr faster, it would have taken 35 minutes less. If it moved 10 km/hr slower, it would have taken 30 minutes more. Find the distance covered by the train during the journey.

Find the smallest positive integer that leaves a remainder of 2 when divided by 3, a remainder of 3 when divided by 4, and a remainder of 4 when divided by 5.

The price of a machine is increased by 20%. Due to a fall in demand, the increased price is then decreased by 25%. Finally, the price is again increased by 10%. The overall percentage change in the price of the machine is:

The average of 7 consecutive even numbers is 32. Find the sum of the smallest and largest numbers.

The sum of two positive numbers is 13 and their product is 30. The positive difference between them is:

Two equal sums of money are lent out for 2 years each, one at 5% per annum simple interest and the other at 7% per annum simple interest. If the difference in simple interest earned on the two sums is ₹40, then what was the principal of each sum (in ₹)?

In a business, P invests ₹2,00,000 for 8 months, Q invests ₹1,50,000 for 9 months and R invests ₹1,20,000 for some complete months. After a year, out of the profit, R gets a higher profit amount than Q but less than P. If R gets ₹72,000 as profit, then the profit of P is ₹_______.

When the cost of an article was decreased by 7%, the number of articles sold was increased by 20%. What was the effect (in percentage) on the revenue?

During a sale, 50% of the goods are sold at 21% profit, 30% of the remaining goods are sold at 43% profit and the still remaining goods are sold at a loss of 17%. If there is an overall profit of x%, then what is the value of x?

The radius of a spherical balloon is increased by 20%. Find the percentage increase in its surface area.

Evaluate \(22^3 + (-6)^3 + (-16)^3\)

The monthly charges of a hostel consist of a fixed part and a variable part depending on the number of students. For 25 students, the total bill is ₹17,500. For 40 students, the total bill is ₹25,000. What is the total bill for 60 students?

The shadow of a tower increases by 20 m when the sun's altitude changes from 60 \(^\circ\) to 45 \(^\circ\) . Find the length (rounded off to one decimal place, in m) of the tower. (Use \(\sqrt3 = 1.7\) )