MNBI1601 Exam Pack 2025-Detailed Question and Answers (100%, Correct A+)

CBEST Mathematics Exam 2025\2026 –Actual Questions
&Answers (A+ Graded with Full Rationale)
1. What is 35% of 200?

A. 50
B. 60
C. 70
D. 80

Answer: C. 70

Rationale: 35% means 0.35. So 0.35 × 200 = 70.



2. Solve: 7x + 5 = 40

A. 3
B. 4
C. 5
D. 6

Answer: B. 5

Rationale: 7x = 40 − 5 = 35, so x = 35 ÷ 7 = 5.



3. A train travels 120 miles in 3 hours. What is its average speed?

A. 30 mph
B. 40 mph
C. 50 mph
D. 60 mph

Answer: B. 40 mph

Rationale: Speed = distance ÷ time = 120 ÷ 3 = 40 mph.



4. Which number is a prime number?

,A. 21
B. 29
C. 33
D. 39

Answer: B. 29

Rationale: 29 has only two factors: 1 and 29.



5. Simplify: 6(3 + 2)

A. 18
B. 24
C. 30
D. 36

Answer: C. 30

Rationale: 3 + 2 = 5, then 6 × 5 = 30.



6. What is the value of x if 2x − 8 = 10?

A. 6
B. 7
C. 8
D. 9

Answer: B. 9

Rationale: 2x = 18, so x = 9.



7. A rectangle has length 10 cm and width 4 cm. What is its area?

A. 14 cm²
B. 20 cm²
C. 40 cm²
D. 80 cm²

Answer: C. 40 cm²

,Rationale: Area = length × width = 10 × 4 = 40.



8. Convert 0.75 into a fraction.

A. 1/4
B. 2/3
C. 3/4
D. 4/5

Answer: C. 3/4

Rationale: 0.75 = 75/100 = 3/4.



9. What is the next number in the pattern: 2, 6, 12, 20, ___?

A. 28
B. 30
C. 32
D. 36

Answer: B. 30

Rationale: Differences are +4, +6, +8, so next is +10 → 20 + 10 = 30.



10. If a dozen eggs cost $3, how much do 4 dozen cost?

A. $9
B. $10
C. $12
D. $15

Answer: C. $12

Rationale: 4 × 3 = 12 dollars.



11. What is the square root of 81?

, A. 7
B. 8
C. 9
D. 10

Answer: C. 9

Rationale: 9 × 9 = 81.



12. Solve: 5x = 45

A. 7
B. 8
C. 9
D. 10

Answer: C. 9

Rationale: x = 45 ÷ 5 = 9.



13. A store gives a 20% discount on $50. What is the discount amount?

A. $5
B. $10
C. $15
D. $20

Answer: B. $10

Rationale: 0.20 × 50 = 10.



14. What is 3/5 as a decimal?

A. 0.5
B. 0.6
C. 0.7
D. 0.8

Answer: B. 0.6