CSS - PMS - CCE - PCS - Mathematics
Triangle
A triangle has total angles equal to:
A. 90°
B. 180°
C. 270°
D. 360°
Correct Answer: B
B: Correct because interior angles of a triangle add up to 180 degrees. A: Wrong because 90° can be one angle in a right triangle, not the total. C: Wrong because 270° is not triangle angle sum. D: Wrong because 360° is quadrilateral angle sum.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The average of 10, 20 and 30 is:
A. 10
B. 15
C. 20
D. 30
Correct Answer: C
C: Correct because the sum is 60 and 60 divided by 3 is 20. A: Wrong because 10 is only one value, not the average. B: Wrong because 15 is too low. D: Wrong because 30 is the largest value, not the average.
CSS - PMS - CCE - PCS - Mathematics
Square
The square of 12 is:
A. 124
B. 144
C. 122
D. 132
Correct Answer: B
B: Correct because 12 multiplied by 12 equals 144. A: Wrong because 124 is not a square of 12. C: Wrong because 122 is not correct multiplication. D: Wrong because 132 is too low.
CSS - PMS - CCE - PCS - Mathematics
Equations
If x + 5 = 12, then x is:
A. 5
B. 7
C. 12
D. 17
Correct Answer: B
B: Correct because subtracting 5 from both sides gives x = 7. A: Wrong because 5 makes the sum 10, not 12. C: Wrong because 12 makes the sum 17. D: Wrong because 17 makes the sum 22.
CSS - PMS - CCE - PCS - Mathematics
Simplification
What is 9² − 5²?
A. 16
B. 36
C. 56
D. 106
Correct Answer: C
A: Wrong because 16 is 4², not the difference of squares here. B: Wrong because 36 is 6². C: Correct because 9² − 5² = 81 − 25 = 56. D: Wrong because 106 is the sum 81+25, not the difference.
CSS - PMS - CCE - PCS - Mathematics
Average / Arithmetic Mean
The median of 2, 5 and 8 is:
A. 2
B. 5
C. 7
D. 8
Correct Answer: B
A: Wrong because 2 is the lowest value. B: Correct because 5 is the middle value when the data are ordered. C: Wrong because 7 is not in the given data and is not the median. D: Wrong because 8 is the highest value.
CSS - PMS - CCE - PCS - Mathematics
Probability
The probability of getting a head when tossing a fair coin is:
A. 0
B. 1/4
C. 1/2
D. 1
Correct Answer: C
A: Wrong because getting head is possible. B: Wrong because a fair coin has two equal outcomes, not four. C: Correct because one favourable outcome out of two gives 1/2. D: Wrong because head is not certain in one toss.
CSS - PMS - CCE - PCS - Mathematics
TimeSpeed & Distance
A car travels 120 km in 3 hours. Its average speed is:
A. 30 km/h
B. 40 km/h
C. 60 km/h
D. 90 km/h
Correct Answer: B
A: Wrong because 30×3 = 90 km. B: Correct because speed = distance/time = 120/3 = 40 km/h. C: Wrong because 60×3 = 180 km. D: Wrong because 90×3 = 270 km.
CSS - PMS - CCE - PCS - Mathematics
Simplification
What is 360 divided by 12?
A. 20
B. 25
C. 30
D. 35
Correct Answer: C
A: Wrong because 12×20 = 240. B: Wrong because 12×25 = 300. C: Correct because 12×30 = 360. D: Wrong because 12×35 = 420.
CSS - PMS - CCE - PCS - Mathematics
Triangle
The sum of the interior angles of a triangle is:
A. 90°
B. 180°
C. 270°
D. 360°
Correct Answer: B
A: Wrong because 90° may be one angle in a right triangle, not the total. B: Correct because every triangle has interior angles summing to 180°. C: Wrong because 270° is not the triangle angle sum. D: Wrong because 360° is the angle sum of a quadrilateral.
CSS - PMS - CCE - PCS - Mathematics
Simplification
What is 0.2 × 0.5?
A. 0.01
B. 0.1
C. 0.7
D. 1.0
Correct Answer: B
A: Wrong because 0.01 is too small for this multiplication. B: Correct because 2×5=10 and two decimal places give 0.10 = 0.1. C: Wrong because 0.7 is the sum 0.2+0.5, not product. D: Wrong because the product of two numbers less than 1 cannot be 1 here.
CSS - PMS - CCE - PCS - Mathematics
Percentage
25% is equal to:
A. 1/2
B. 1/3
C. 1/4
D. 3/4
Correct Answer: C
A: Wrong because 1/2 equals 50%. B: Wrong because 1/3 is about 33.33%. C: Correct because 25% = 25/100 = 1/4. D: Wrong because 3/4 equals 75%.
CSS - PMS - CCE - PCS - Mathematics
Interest
Simple interest on Rs.1000 at 10% per annum for 2 years is:
A. Rs.100
B. Rs.150
C. Rs.200
D. Rs.300
Correct Answer: C
A: Wrong because Rs.100 is interest for one year only. B: Wrong because it does not match PRT/100. C: Correct because SI = 1000 × 10 × 2 / 100 = Rs.200. D: Wrong because Rs.300 would require a longer time or higher rate.
CSS - PMS - CCE - PCS - Mathematics
HCF
The HCF of 18 and 24 is:
A. 3
B. 6
C. 9
D. 12
Correct Answer: B
A: Wrong because 3 is a common factor but not the highest. B: Correct because the highest common factor of 18 and 24 is 6. C: Wrong because 9 does not divide 24. D: Wrong because 12 does not divide 18.
CSS - PMS - CCE - PCS - Mathematics
HCF and LCM
The LCM of 6 and 8 is:
A. 12
B. 18
C. 24
D. 48
Correct Answer: C
A: Wrong because 12 is not divisible by 8. B: Wrong because 18 is not divisible by 8. C: Correct because 24 is the smallest number divisible by both 6 and 8. D: Wrong because 48 is common multiple but not the least.
CSS - PMS - CCE - PCS - Mathematics
Number System
Which of the following is a prime number?
A. 21
B. 29
C. 35
D. 39
Correct Answer: B
A: Wrong because 21 = 3 × 7. B: Correct because 29 has no divisors other than 1 and 29. C: Wrong because 35 = 5 × 7. D: Wrong because 39 = 3 × 13.
CSS - PMS - CCE - PCS - Mathematics
Simplification
The value of 2⁵ is:
A. 10
B. 16
C. 25
D. 32
Correct Answer: D
A: Wrong because 2×5 = 10, but exponent means repeated multiplication. B: Wrong because 16 is 2⁴. C: Wrong because 25 is 5². D: Correct because 2⁵ = 2×2×2×2×2 = 32.
CSS - PMS - CCE - PCS - Mathematics
Simplification
Solve: x + 7 = 15. What is x?
A. 6
B. 7
C. 8
D. 9
Correct Answer: C
A: Wrong because 6 + 7 = 13. B: Wrong because 7 + 7 = 14. C: Correct because 8 + 7 = 15. D: Wrong because 9 + 7 = 16.
CSS - PMS - CCE - PCS - Mathematics
Rectangle
The area of a rectangle of length 6 cm and width 4 cm is:
A. 10 cm²
B. 20 cm²
C. 24 cm²
D. 36 cm²
Correct Answer: C
A: Wrong because 10 is the sum of 6 and 4, not area. B: Wrong because 20 is not length × width. C: Correct because area = 6 × 4 = 24 cm². D: Wrong because 36 is 6 × 6, not 6 × 4.
CSS - PMS - CCE - PCS - Mathematics
Square
The perimeter of a square with side 5 cm is:
A. 10 cm
B. 20 cm
C. 25 cm
D. 30 cm
Correct Answer: B
A: Wrong because 10 cm equals only two sides. B: Correct because perimeter of square = 4 × side = 4 × 5 = 20 cm. C: Wrong because 25 cm² would be the area, not perimeter. D: Wrong because 30 cm is not 4 × 5.