RRB-NTPC 2016 Mathematics

Practice subject-wise previous year questions

Question 576

Question 577

Question 578

Question 579

Question 580

Question 581

Question 582

\(25\sqrt3\) meters

\(10\sqrt3\) meters

\(20\sqrt3\) meters

\(30\sqrt3\) meters

Question 583

Question 584

Question 585

Question 586

Question 587

10 \(\sqrt2\) and 24 \(\sqrt2\)

5 \(\sqrt2\) and 12 \(\sqrt2\)

Question 588

Question 589

Question 590

4 \(\sqrt6\)

6 \(\sqrt6\)

8 \(\sqrt3\)

Question 591

Question 592

Question 593

Question 594

Question 595

Question 596

Question 597

Question 598

Question 599

\(8\tfrac13\) % decrease

\(7\tfrac14\) % increase

\(6\tfrac14\) % decrease

\(8\tfrac13\) % increase

Question 600

A person sells two items: one at a profit of 20% and another at a loss of 10%. If both items cost ₹100 each, what is the overall gain or loss percentage?

A town had a population of 5,000 at the beginning of a year. During the first year, the population decreased by 10%. In the following year, the population increased by 20%. What was the population of the town at the end of two years?

Evaluate \(23^3 + (-15)^3 + (-8)^3\)

During a sale, 50% of the goods are sold at 12% profit, 40% of the remaining goods are sold at 16% profit and the still remaining goods are sold at a loss of 19%. If there is an overall profit of x%, then what is the value of x?

10 men and 15 women can complete a project in 12 days. If after 8 days, only \(\tfrac23\) of the work is completed, how many more women must be added to finish the work in the next 2 days, assuming all men continue?

Which of the following numbers is divisible by 7?

An amount of ₹6,900 is obtained after 3 years at simple interest at the rate of 5% interest per annum. What is the principal invested?

The present ages of two persons, X and Y, are in the ratio 4 : 5. Five years from now, the difference between X's age and Y's age will be 3 years. Find the sum of their present ages (in years).

The diagonals of a rhombus are in the ratio 5 : 12 and its area is 240 cm². Find the lengths (in cm) of the diagonals.

Three numbers are in the ratio 10 : 13 : 11, and their LCM is 2860. Their HCF is:

The lengths of two rods are 4 cm and 6 cm. A third rod is made such that the three rods are in continued proportion. What will be the length of the third rod?

A solid cylinder of radius 6 cm and height 14 cm is melted and recast into a hollow cylinder of half the height of the original cylinder. If the outer radius of the hollow cylinder is twice its inner radius, find the outer radius (in cm) of the hollow cylinder.

The sides of a triangle are 51 cm, 35 cm, and 26 cm. What is the length (in cm) of its altitude corresponding to the side with a length of 35 cm?

What is the smallest number that must be added to 4583 so that the resulting number is divisible by 9?

Mike, Connor and Floyd can finish a certain piece of work in 8, 22 and 33 days, respectively. All three of them started the work together. Mike left the work after 4 days and Connor left just 2 days before the work was completed. Find the total number of days taken for the work to be completed.

A trader sells an article at a profit of 16%. If he had sold it for ₹80 more, his profit would have been 48%. Find the number of articles sold, given that the total cost price is ₹8,000.

Subrata invested a certain amount of money at 10% per annum. After 2 years, he received ₹220.5 as compound interest, compounded annually. Find the corresponding simple interest (in ₹) for 2 years at the same rate.

Nisha noted the number 76488 in her register. What is the remainder when it is divided by 8?

Evaluate \(20^3 + (-16)^3 + (-4)^3\)

A shopkeeper buys sugar at ₹25 per kg. He marks it at ₹32 per kg and allows a 20% discount on the marked price. While selling, he uses an 800 g weight instead of 1 kg. There is no other loss or expense. What is the overall profit or loss percentage of the shopkeeper?

A person spends 70% of his income. If his income increases by 20% and his expenditure increases by 25%, then find the percentage change in his savings.

The number of hours spent per day by 10 students watching educational videos during a week are as follows: 2, 3, 4, 2, 5, 3, 2, 4, 2, 3. Find the mode.