Basic Maths and Reasoning MCQs (page 2 of 212)
Percentages, ratios, averages, profit and loss, speed and time, number series and simple logical reasoning, with the working shown for every answer.
4,221 questions. Select an option to check your answer, or open "Show answer". Showing 21–40.
- 21.
Which number is the odd one out: 2, 3, 5, 9, 11?
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Answer: C. 9
All the others are prime numbers. 9 = 3 × 3.
- 22.
Ali is taller than Bilal, and Bilal is taller than Usman. Who is the tallest?
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Answer: B. Ali
Ali > Bilal > Usman, so Ali is the tallest.
- 23.
If CAT is written as DBU in a code, how is DOG written?
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Answer: C. EPH
Each letter moves one place forward: D→E, O→P, G→H.
- 24.
If today is Monday, what day will it be after 10 days?
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Answer: A. Thursday
After 7 days it is Monday again; 3 more days gives Thursday.
- 25.
Ali is 4 years older than Sara. The sum of their ages is 30. How old is Ali?
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Answer: C. 17
Sara = x, Ali = x + 4. 2x + 4 = 30, so x = 13 and Ali = 17.
- 26.
A can finish a job in 10 days and B in 15 days. Working together, how long will they take?
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Answer: B. 6 days
Together they do 1/10 + 1/15 = 1/6 of the job per day, so 6 days.
- 27.
12 workers can finish a job in 10 days. How many days will 20 workers take?
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Answer: B. 6 days
Total work = 12 × 10 = 120 worker-days. 120 ÷ 20 = 6 days.
- 28.
What is the sum of the interior angles of a triangle?
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Answer: B. 180°
The three angles of any triangle add up to 180°.
- 29.
What is the sum of the interior angles of a hexagon?
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Answer: C. 720°
(n − 2) × 180° = (6 − 2) × 180° = 720°.
- 30.
What is the area of a rectangle 12 m long and 5 m wide?
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Answer: C. 60 m²
Area = length × width = 12 × 5 = 60 m².
- 31.
What is the perimeter of a square with sides of 7 cm?
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Answer: C. 28 cm
Perimeter = 4 × 7 = 28 cm.
- 32.
Taking π = 22/7, what is the area of a circle of radius 7 cm?
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Answer: C. 154 cm²
Area = πr² = 22/7 × 7 × 7 = 154 cm².
- 33.
0.25 written as a fraction is:
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Answer: D. 1/4
0.25 = 25/100 = 1/4.
- 34.
3/4 written as a percentage is:
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Answer: C. 75%
3 ÷ 4 = 0.75 = 75%.
- 35.
What is the angle between the hands of a clock at 3:00?
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Answer: B. 90°
Each hour mark is 30° apart; from 12 to 3 is 3 × 30° = 90°.
- 36.
What is the value of 7 × 8 − 6 ÷ 2?
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Answer: C. 53
Multiply and divide first: 56 − 3 = 53.
- 37.
What is the smallest prime number?
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Answer: C. 2
1 is not prime because it has only one factor. 2 is the smallest and only even prime.
- 38.
The Roman numeral XIV stands for:
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Answer: B. 14
X = 10 and IV = 4, so XIV = 14.
- 39.
How many seconds are there in one hour?
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Answer: C. 3,600
60 minutes × 60 seconds = 3,600 seconds.
- 40.
What is the average of the first five natural numbers?
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Answer: B. 3
(1 + 2 + 3 + 4 + 5) ÷ 5 = 15 ÷ 5 = 3.