Mock Test

Exam: RRB NTPC Subject: Quantitative Aptitude

Total Questions: 20

Q1. How many divisors are there for the number 315?

12 13 14 15
Q2. How many corners does a cube have?

4 6 8 12
Q3. Consider a rectangle with fixed area. To minimize its perimeter, the rectangle should be:

As long and thin as possible As short and wide as possible A square Its dimensions don't matter for perimeter
Q4. What is the term for a transformation that preserves the cross-ratio of four collinear points?

Isometry Homothety Projectivity Affinity
Q5. The sum of two numbers is 850. If 50% of the first number is equal to 30% of the second number, what is the larger number?

510 520 530 540
Q6. A, B, C run a race. A beats B by 10 meters and C by 20 meters. B beats C by 10 meters. What is the length of the race?

100 meters 150 meters 200 meters 250 meters
Q7. A group with a solvable word problem is also known as:

A hyperbolic group A Tarski monster A solvable group A recursive group
Q8. A can do a work in 15 days. B can do it in 20 days. They work together for 5 days, after which A leaves. In how many days will B complete the remaining work?

5 days 6 days 7 days 8 days
Q9. The bar graph represents the number of students who chose different streams in 12th grade. If 300 students chose Science, and this represents 40% of the total students, how many students chose Commerce?

150 180 200 225
Q10. The mean of 5 numbers is 15. If each number is decreased by 3, what is the new mean?

10 11 12 13
Q11. If 60% of the students in a class are boys, and the number of girls is 280, then the total number of students in the class is:

700 750 800 850
Q12. A can finish a work in 10 hours, B in 12 hours, and C in 15 hours. They start working together. After 2 hours, A leaves. B and C continue working. How many more hours will B and C take to complete the work?

3 hours 3.5 hours 4 hours 4.5 hours
Q13. A mother's age is 5 times her daughter's age. After 5 years, the mother will be 3 times as old as her daughter. What is the present age of the mother?

50 years 45 years 40 years 35 years
Q14. The number 1 is:

Prime Composite Neither prime nor composite Even
Q15. A boat takes 3 hours to travel 30 km downstream. The speed of the stream is 3 km/hr. What is the speed of the boat in still water?

7 km/hr 10 km/hr 13 km/hr 15 km/hr
Q16. Find the least number which when divided by 15, 20, 25, and 30 leaves remainders 7, 12, 17, and 22 respectively.

293 300 303 307
Q17. If 5x + 3y = 32 and 3x + 5y = 32, what is the value of x + y?

7 8 9 10
Q18. The number of diagonals in a polygon with n sides is given by the formula:

n(n-1)/2 n(n-3)/2 n(n-2)/2 n(n-4)/2
Q19. What is 20% of 150?

15 20 30 40
Q20. The table shows the marks obtained by students in five subjects. What is the average marks obtained by a student in all five subjects?

70 75 80 85

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