Tag: math mcqs

A. 200
B. 250
C. 300
D. 350

Solution:
Work ∝ Men × Days
Total consumption = 250 kg
1 man-day consumption = 250 ÷ (25 × 20) = 0.5 kg
For 20 × 25 = 500 man-days → 500 × 0.5 = 250 kg
Answer: B

A. 200
B. 250
C. 300
D. 400

A. 44
B. 45
C. 46
D. 47

Solution:
Pattern: +5, +7, +9, +11 …
Next = 33 + 13 = 46
Answer: C

A. 20
B. 22
C. 24
D. 30

Solution:
Work ∝ Men × Days
12 × 18 = 9 × x
x = (12 × 18) / 9 = 24
Answer: C

A. 8 sec
B. 10 sec
C. 12 sec
D. 15 sec

Solution:
Speed = 54 × 1000 / 3600 = 15 m/s
Time = Distance ÷ Speed = 150 ÷ 15 = 10 sec
Answer: B

A. 9
B. 10
C. 11
D. 12

Solution:
Multiples: 3, 6, 9, 12, 15
Sum = 45 → Average = 45 ÷ 5 = 9
Answer: A

A. 0%
B. 4% increase
C. 4% decrease
D. 2% decrease

Solution:
Effect = (20 – 20 – (20×20)/100) = –4%
Answer: C