ISSB - PAF Officer Selection Mathematics Algebra — Set 3

Algebra MCQs set 3 for ISSB - PAF Officer Selection Mathematics — 20 solved questions.

ISSB - PAF Officer Selection Mathematics Algebra — Set 3

  1. Question 1

    Q1. If 6x - 4 = 2x + 12, then x equals?

    • A) 3
    • B) 4
    • C) 5
    • D) 6

    Answer: 4

    Explanation: Subtract 2x and add 4 to get 4x equals 16 so x is 4.

  2. Question 2

    Q2. If √(x + 5) = 4, then x equals?

    • A) 9
    • B) 10
    • C) 11
    • D) 12

    Answer: 11

    Explanation: Square both sides x plus 5 equals 16 so x is 11.

  3. Question 3

    Q3. If 3a + 2b = 16 and a = 4, then b equals?

    • A) 1
    • B) 2
    • C) 3
    • D) 4

    Answer: 2

    Explanation: Substitute a equals 4 to get 12 plus 2b equals 16 so b is 2.

  4. Question 4

    Q4. If 3x + 6 = 21, then x equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Subtract 6 to get 3x equals 15 so x is 5. Apply the same method to similar ISSB quantitative items.

  5. Question 5

    Q5. If 5x - 10 = 25, then x equals?

    • A) 5
    • B) 6
    • C) 7
    • D) 8

    Answer: 7

    Explanation: Add 10 to get 5x equals 35 so x is 7. Apply the same method to similar ISSB quantitative items.

  6. Question 6

    Q6. If x/4 + 1 = 6, then x equals?

    • A) 16
    • B) 18
    • C) 20
    • D) 24

    Answer: 20

    Explanation: Subtract 1 and multiply by 4 to get x equals 20. Apply the same method to similar ISSB quantitative items.

  7. Question 7

    Q7. If 2(x + 5) = 18, then x equals?

    • A) 3
    • B) 4
    • C) 5
    • D) 6

    Answer: 4

    Explanation: Divide by 2 to get x plus 5 equals 9 so x is 4.

  8. Question 8

    Q8. If 6x + 2 = 4x + 14, then x equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 6

    Explanation: Subtract 4x and 2 to get 2x equals 12 so x is 6.

  9. Question 9

    Q9. If 9x - 4 = 41, then x equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Add 4 to get 9x equals 45 so x is 5. Work each step carefully; ISSB math rewards accuracy under time pressure.

  10. Question 10

    Q10. If x² - 25 = 0, positive x equals?

    • A) 3
    • B) 4
    • C) 5
    • D) 6

    Answer: 5

    Explanation: x squared equals 25 so positive x is 5. Work each step carefully; ISSB math rewards accuracy under time pressure.

  11. Question 11

    Q11. If 3x + 4y = 26 and x = 2, then y equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Substitute x equals 2 to get 6 plus 4y equals 26 so y is 5.

  12. Question 12

    Q12. If 8x - 3 = 5x + 12, then x equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Subtract 5x and add 3 to get 3x equals 15 so x is 5.

  13. Question 13

    Q13. If √(x + 8) = 6, then x equals?

    • A) 26
    • B) 27
    • C) 28
    • D) 29

    Answer: 28

    Explanation: Square both sides x plus 8 equals 36 so x is 28.

  14. Question 14

    Q14. If 4a + 5b = 38 and a = 2, then b equals?

    • A) 5
    • B) 6
    • C) 7
    • D) 8

    Answer: 6

    Explanation: Substitute a equals 2 to get 8 plus 5b equals 38 so b is 6.

  15. Question 15

    Q15. If 7x + 3 = 31, then x equals?

    • A) 3
    • B) 4
    • C) 5
    • D) 6

    Answer: 4

    Explanation: Subtract 3 to get 7x equals 28 so x is 4. Work each step carefully; ISSB math rewards accuracy under time pressure.

  16. Question 16

    Q16. If 4x - 8 = 20, then x equals?

    • A) 5
    • B) 6
    • C) 7
    • D) 8

    Answer: 7

    Explanation: Add 8 to get 4x equals 28 so x is 7. Work each step carefully; ISSB math rewards accuracy under time pressure.

  17. Question 17

    Q17. If 9x + 5 = 50, then x equals?

    • A) 4
    • B) 5
    • C) 6
    • D) 7

    Answer: 5

    Explanation: Subtract 5 to get 9x equals 45 so x is 5. Work each step carefully; ISSB math rewards accuracy under time pressure.

  18. Question 18

    Q18. If 3x + 11 = 32, then x equals?

    • A) 6
    • B) 7
    • C) 8
    • D) 9

    Answer: 7

    Explanation: Subtract 11 to get 3x equals 21 so x is 7. Work each step carefully; ISSB math rewards accuracy under time pressure.

  19. Question 19

    Q19. If 8x - 12 = 36, then x equals?

    • A) 5
    • B) 6
    • C) 7
    • D) 8

    Answer: 6

    Explanation: Add 12 to get 8x equals 48 so x is 6. Work each step carefully; ISSB math rewards accuracy under time pressure.

  20. Question 20

    Q20. If 5x + 9 = 44, then x equals?

    • A) 6
    • B) 7
    • C) 8
    • D) 9

    Answer: 7

    Explanation: Subtract 9 to get 5x equals 35 so x is 7. Work each step carefully; ISSB math rewards accuracy under time pressure.