ISSB - PAF Officer Selection Mathematics: Most Repeated MCQs with Answers

ISSB - PAF Officer Selection Mathematics Most Repeated sample MCQs

1. Q1. If 30% of a number is 45, what is the number?

   • A) 120
   • B) 135
   • C) 150
   • D) 165

   Answer: 150

2. Q2. A train 150 m long passes a pole in 15 seconds. Its speed in km/h is:

   • A) 36
   • B) 40
   • C) 45
   • D) 54

   Answer: 36

3. Q3. If x² − 9 = 0, then x equals:

   • A) 3 only
   • B) −3 only
   • C) 3 or −3
   • D) 9

   Answer: 3 or −3

4. Q4. A shopkeeper marks goods 25% above cost and gives 10% discount. Profit % is:

   • A) 12.5%
   • B) 15%
   • C) 17.5%
   • D) 22.5%

   Answer: 12.5%

5. Q5. A shop marks an item up 25% then offers 20% discount on marked price. Net result?

   • A) 5% profit
   • B) 0% (no profit, no loss)
   • C) 5% loss
   • D) 10% profit

   Answer: 0% (no profit, no loss)

6. Q6. 40 km route: first 20 km at 10 km/h, next 20 km at 20 km/h. Average speed?

   • A) 15 km/h
   • B) 13.3 km/h
   • C) 12 km/h
   • D) 16 km/h

   Answer: 13.3 km/h

7. Q7. A number increased by 20% becomes 240. Original number?

   • A) 192
   • B) 200
   • C) 220
   • D) 288

   Answer: 200

8. Q8. Simple interest on Rs 8000 at 5% for 4 years?

   • A) Rs 1200
   • B) Rs 1600
   • C) Rs 2000
   • D) Rs 2400

   Answer: Rs 1600

9. Q9. If x/3 = 4, then 2x = ?

   • A) 12
   • B) 18
   • C) 24
   • D) 36

   Answer: 24

10. Q10. If 3x + 7 = 22, value of 2x − 5?

    • A) 5
    • B) 7
    • C) 10
    • D) 15

    Answer: 5

11. Q11. Next term: 3, 9, 27, 81, ?

    • A) 162
    • B) 243
    • C) 324
    • D) 729

    Answer: 243

12. Q12. If 40% of a number is 64, the number is:

    • A) 160
    • B) 256
    • C) 96
    • D) 128

    Answer: 160

13. Q13. A train 150 m long crosses a pole in 15 s. Speed in km/h?

    • A) 36
    • B) 54
    • C) 72
    • D) 90

    Answer: 36

14. Q14. Perimeter of square with side 12 cm?

    • A) 24 cm
    • B) 36 cm
    • C) 48 cm
    • D) 144 cm

    Answer: 48 cm

15. Q15. Ratio 2:5. If smaller part is 14, larger part is:

    • A) 28
    • B) 35
    • C) 40
    • D) 70

    Answer: 35

16. Q16. Cost price Rs 400, selling price Rs 500. Profit percent?

    • A) 20%
    • B) 25%
    • C) 30%
    • D) 40%

    Answer: 25%

17. Q17. A train 120 metres long passes an electric pole in 8 seconds. What is the speed of the train in km/h?

    • A) 48 km/h
    • B) 50 km/h
    • C) 54 km/h
    • D) 60 km/h

    Answer: 54 km/h

18. Q18. A train 180 metres long running at 72 km/h crosses a platform 320 metres long. How many seconds does it take to clear the platform completely?

    • A) 20 seconds
    • B) 25 seconds
    • C) 30 seconds
    • D) 36 seconds

    Answer: 25 seconds

19. Q19. Two trains 90 m and 110 m long run in the same direction at 45 km/h and 63 km/h. How long does the faster train take to completely pass the slower one?

    • A) 30 seconds
    • B) 35 seconds
    • C) 38 seconds
    • D) 40 seconds

    Answer: 40 seconds

20. Q20. Two trains start from stations 360 km apart and move towards each other at 50 km/h and 70 km/h. After how many hours will they meet?

    • A) 3 hours
    • B) 3.5 hours
    • C) 4 hours
    • D) 4.5 hours

    Answer: 3 hours

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