Quant Practice Questions

These are PYQ-style/template questions based on common CoCubes placement patterns.

Questions

Q1. Percentage

A number is increased by 25% and becomes 500. What is the original number?

A. 375
B. 400
C. 425
D. 450

Answer: B

Explanation: 1.25x = 500, so x = 400.

Q2. Successive percentage

A price is increased by 20% and then decreased by 10%. What is the net change?

A. 8% increase
B. 10% increase
C. 8% decrease
D. 12% increase

Answer: A

Explanation: 20 - 10 - (20×10)/100 = 8% increase.

Q3. Profit and loss

A shopkeeper buys an item for ₹800 and sells it for ₹920. Find profit percentage.

A. 10%
B. 12%
C. 15%
D. 20%

Answer: C

Explanation: Profit = 120. Profit % = 120/800 × 100 = 15%.

Q4. Discount

Marked price is ₹1000. Discount is 15%. Selling price?

A. ₹750
B. ₹800
C. ₹850
D. ₹900

Answer: C

Q5. Average

Average of 5 numbers is 24. If one number 20 is replaced by 35, new average?

A. 25
B. 26
C. 27
D. 28

Answer: C

Explanation: Sum increases by 15. Average increases by 15/5 = 3. New average = 27.

Q6. Ratio

Two numbers are in ratio 4:7. Their sum is 88. Find the larger number.

A. 44
B. 48
C. 56
D. 60

Answer: C

Explanation: 11 parts = 88, one part = 8, larger = 7×8 = 56.

Q7. Time and work

A can complete work in 12 days and B in 18 days. Together they complete it in:

A. 6.2 days
B. 7.2 days
C. 8 days
D. 9 days

Answer: B

Explanation: LCM work = 36. A = 3/day, B = 2/day, together = 5/day. Time = 36/5 = 7.2.

Q8. Pipes

A pipe fills a tank in 6 hours. Another empties it in 12 hours. If both are open, tank fills in:

A. 4 hours
B. 8 hours
C. 10 hours
D. 12 hours

Answer: D

Explanation: Net rate = 1/6 - 1/12 = 1/12.

Q9. Speed

A train of length 200 m crosses a pole in 10 seconds. Speed in km/h?

A. 54
B. 60
C. 72
D. 90

Answer: C

Explanation: speed = 20 m/s = 20×18/5 = 72 km/h.

Q10. Boats

Downstream speed is 18 km/h and upstream speed is 10 km/h. Speed of stream?

A. 3 km/h
B. 4 km/h
C. 5 km/h
D. 6 km/h

Answer: B

Explanation: (18 - 10)/2 = 4.

Q11. LCM/HCF

HCF of two numbers is 6 and LCM is 180. If one number is 30, the other is:

A. 24
B. 30
C. 36
D. 40

Answer: C

Explanation: Product = 6×180 = 1080. Other = 1080/30 = 36.

Q12. Probability

A die is rolled once. Probability of getting an even number?

A. 1/6
B. 1/3
C. 1/2
D. 2/3

Answer: C

Q13. Mixture

Tea worth ₹60/kg is mixed with tea worth ₹80/kg in ratio 3:2. Average price?

A. ₹64
B. ₹68
C. ₹70
D. ₹72

Answer: B

Explanation: (3×60 + 2×80)/5 = 68.

Q14. Simple interest

Find SI on ₹5000 at 10% per annum for 2 years.

A. ₹500
B. ₹800
C. ₹1000
D. ₹1200

Answer: C

Q15. Number system

Which of the following is divisible by 9?

A. 12345
B. 23454
C. 56782
D. 10001

Answer: B

Explanation: Sum of digits = 2+3+4+5+4 = 18.

Practice target

Repeat this set until you can finish all 15 in 15 minutes with at least 13 correct.