ISSB - Pak Navy Officer Selection Mathematics: Geometry MCQs

ISSB - Pak Navy Officer Selection Mathematics: Geometry MCQs — sample questions

1. Question 1

   Q1. How many degrees in the sum of interior angles of a hexagon?

   • A) 540
   • B) 620
   • C) 720
   • D) 900

   Answer: 720

   Explanation: Formula: (n−2)×180°. Hexagon n=6 → 4×180 = 720°. ISSB geometry basics appear regularly.

2. Question 2

   Q2. Perimeter of rectangle: length 15 m, width 10 m. Area?

   • A) 50 m²
   • B) 100 m²
   • C) 150 m²
   • D) 300 m²

   Answer: 150 m²

   Explanation: Area = l×w = 15×10 = 150 m². Perimeter would be 50 m - trap option A.

3. Question 3

   Q3. Area of circle with radius 7 cm? (Use pi = 22/7)

   • A) 154 cm2
   • B) 44 cm2
   • C) 308 cm2
   • D) 49 cm2

   Answer: 154 cm2

   Explanation: Area = pi r^2 = 22/7 x 49 = 154. Option D is r squared without pi, a frequent trap.

4. Question 4

   Q4. Perimeter of square with side 12 cm?

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

   Answer: 48 cm

   Explanation: Perimeter = 4 x side = 48 cm. 144 is area, not perimeter.

5. Question 5

   Q5. Volume of cube with edge 3 cm?

   • A) 9 cm3
   • B) 18 cm3
   • C) 27 cm3
   • D) 36 cm3

   Answer: 27 cm3

   Explanation: Volume = side cubed = 3 x 3 x 3 = 27. Nine is face area, not volume.

6. Question 6

   Q6. How many degrees in a straight angle?

   • A) 90
   • B) 180
   • C) 270
   • D) 360

   Answer: 180

   Explanation: A straight line forms 180 degrees. Right angle is 90. Work each step carefully; ISSB math rewards accuracy under time pressure.

7. Question 7

   Q7. Sum of angles in a triangle?

   • A) 90
   • B) 180
   • C) 270
   • D) 360

   Answer: 180

   Explanation: Interior angles of any triangle add to 180 degrees. Work each step carefully; ISSB math rewards accuracy under time pressure.

8. Question 8

   Q8. Diameter of circle is 14 cm. Radius is:

   • A) 7 cm
   • B) 14 cm
   • C) 28 cm
   • D) 44 cm

   Answer: 7 cm

   Explanation: Radius is half the diameter. 14/2 = 7 cm. Work each step carefully; ISSB math rewards accuracy under time pressure.

9. Question 9

   Q9. The area of a rectangle with length 15 cm and breadth 8 cm is:

   • A) 23 cm2
   • B) 46 cm2
   • C) 120 cm2
   • D) 240 cm2

   Answer: 120 cm2

   Explanation: Area of a rectangle is length times breadth. Fifteen times 8 equals 120 square centimetres.

10. Question 10

    Q10. The perimeter of a square is 64 cm. What is the length of one side?

    • A) 8 cm
    • B) 16 cm
    • C) 32 cm
    • D) 64 cm

    Answer: 16 cm

    Explanation: Perimeter is four times the side. Side equals 64 divided by 4, which is 16 cm.

11. Question 11

    Q11. The perimeter of a square is 40 cm. What is the length of one side?

    • A) 5 cm
    • B) 8 cm
    • C) 10 cm
    • D) 20 cm

    Answer: 10 cm

    Explanation: Perimeter of a square is 4 times side. Side equals 40 divided by 4, which is 10 cm.

12. Question 12

    Q12. Area of a rectangle is 48 cm² and length is 8 cm. What is the breadth?

    • A) 4 cm
    • B) 6 cm
    • C) 8 cm
    • D) 12 cm

    Answer: 6 cm

    Explanation: Area equals length times breadth. Breadth is 48 divided by 8, which is 6 cm.

13. Question 13

    Q13. Area of a square with side 9 cm is:

    • A) 18 cm²
    • B) 36 cm²
    • C) 81 cm²
    • D) 72 cm²

    Answer: 81 cm²

    Explanation: Area of a square is side squared. 9 times 9 equals 81.

14. Question 14

    Q14. Perimeter of a rectangle 8 cm by 5 cm is:

    • A) 13 cm
    • B) 26 cm
    • C) 40 cm
    • D) 20 cm

    Answer: 26 cm

    Explanation: Perimeter is 2 times length plus breadth. 2 times 13 equals 26.

15. Question 15

    Q15. Area of a triangle with base 10 cm and height 6 cm is:

    • A) 30 cm²
    • B) 60 cm²
    • C) 16 cm²
    • D) 20 cm²

    Answer: 30 cm²

    Explanation: Area is half base times height. Half of 60 is 30. Work each step carefully; ISSB math rewards accuracy under time pressure.

16. Question 16

    Q16. Area of rectangle 12 cm by 5 cm is:

    • A) 17 cm²
    • B) 60 cm²
    • C) 34 cm²
    • D) 30 cm²

    Answer: 60 cm²

    Explanation: Area equals length times breadth. 12 times 5 equals 60. Work each step carefully; ISSB math rewards accuracy under time pressure.

17. Question 17

    Q17. Perimeter of square side 7 cm is:

    • A) 14 cm
    • B) 28 cm
    • C) 49 cm
    • D) 21 cm

    Answer: 28 cm

    Explanation: Perimeter is 4 times side. 4 times 7 equals 28. Work each step carefully; ISSB math rewards accuracy under time pressure.

18. Question 18

    Q18. Area of triangle base 8 height 5 is:

    • A) 20
    • B) 40
    • C) 13
    • D) 10

    Answer: 20

    Explanation: Area is half of base times height. Half of 40 is 20.

19. Question 19

    Q19. Circumference of circle radius 7 (pi=22/7) is:

    • A) 22
    • B) 44
    • C) 14
    • D) 88

    Answer: 44

    Explanation: Circumference is 2 pi r. 2 times 22/7 times 7 equals 44.

20. Question 20

    Q20. Area of square side 6 cm:

    • A) 12
    • B) 24
    • C) 36
    • D) 48

    Answer: 36

    Explanation: Area is side squared. 6 times 6 equals 36. Work each step carefully; ISSB math rewards accuracy under time pressure.