Basic Maths and Reasoning MCQs (page 43 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 841–860.
- 841.
What is the LCM of 7 and 42?
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Answer: B. 42
The lowest common multiple of 7 and 42 is 42. Check: LCM × HCF = 42 × 7 = 294 = 7 × 42.
- 842.
What is the LCM of 22 and 24?
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Answer: B. 264
The lowest common multiple of 22 and 24 is 264. Check: LCM × HCF = 264 × 2 = 528 = 22 × 24.
- 843.
What is the HCF of 39 and 40?
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Answer: A. 1
The highest number dividing both 39 and 40 exactly is 1.
- 844.
What is the LCM of 14 and 20?
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Answer: C. 140
The lowest common multiple of 14 and 20 is 140. Check: LCM × HCF = 140 × 2 = 280 = 14 × 20.
- 845.
What is the LCM of 29 and 39?
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Answer: C. 1,131
The lowest common multiple of 29 and 39 is 1131. Check: LCM × HCF = 1131 × 1 = 1131 = 29 × 39.
- 846.
What is the HCF of 48 and 52?
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Answer: B. 4
The highest number dividing both 48 and 52 exactly is 4.
- 847.
What is the HCF of 9 and 15?
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Answer: B. 3
The highest number dividing both 9 and 15 exactly is 3.
- 848.
What is the HCF of 11 and 12?
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Answer: A. 1
The highest number dividing both 11 and 12 exactly is 1.
- 849.
What is the HCF of 11 and 21?
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Answer: A. 1
The highest number dividing both 11 and 21 exactly is 1.
- 850.
What is the square of 11?
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Answer: C. 121
11 × 11 = 121.
- 851.
What is the square root of 121?
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Answer: C. 11
11 × 11 = 121, so √121 = 11.
- 852.
What is the square of 13?
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Answer: B. 169
13 × 13 = 169.
- 853.
What is the square root of 169?
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Answer: C. 13
13 × 13 = 169, so √169 = 13.
- 854.
What is the square root of 196?
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Answer: B. 14
14 × 14 = 196, so √196 = 14.
- 855.
What is the square root of 225?
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Answer: C. 15
15 × 15 = 225, so √225 = 15.
- 856.
What is the square of 16?
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Answer: C. 256
16 × 16 = 256.
- 857.
What is the square root of 256?
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Answer: B. 16
16 × 16 = 256, so √256 = 16.
- 858.
What is the square of 17?
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Answer: B. 289
17 × 17 = 289.
- 859.
What is the square of 18?
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Answer: C. 324
18 × 18 = 324.
- 860.
What is the square root of 324?
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Answer: B. 18
18 × 18 = 324, so √324 = 18.