Basic Maths and Reasoning MCQs (page 34 of 212)

Percentages, ratios, averages, profit and loss, speed and time, number series and simple logical reasoning, with the working shown for every answer.

Practise 10 questions Timed test

4,221 questions. Select an option to check your answer, or open "Show answer". Showing 661–680.

661.
What is the LCM of 12 and 36?
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Answer: C. 36
The lowest common multiple of 12 and 36 is 36. Check: LCM × HCF = 36 × 12 = 432 = 12 × 36.
662.
What is the HCF of 20 and 49?
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Answer: A. 1
The highest number dividing both 20 and 49 exactly is 1.
663.
What is the HCF of 5 and 21?
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Answer: A. 1
The highest number dividing both 5 and 21 exactly is 1.
664.
What is the HCF of 23 and 45?
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Answer: A. 1
The highest number dividing both 23 and 45 exactly is 1.
665.
What is the LCM of 23 and 54?
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Answer: C. 1,242
The lowest common multiple of 23 and 54 is 1242. Check: LCM × HCF = 1242 × 1 = 1242 = 23 × 54.
666.
What is the HCF of 10 and 29?
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Answer: A. 1
The highest number dividing both 10 and 29 exactly is 1.
667.
What is the LCM of 19 and 41?
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Answer: C. 779
The lowest common multiple of 19 and 41 is 779. Check: LCM × HCF = 779 × 1 = 779 = 19 × 41.
668.
What is the HCF of 24 and 37?
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Answer: A. 1
The highest number dividing both 24 and 37 exactly is 1.
669.
What is the LCM of 18 and 21?
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Answer: C. 126
The lowest common multiple of 18 and 21 is 126. Check: LCM × HCF = 126 × 3 = 378 = 18 × 21.
670.
What is the LCM of 25 and 45?
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Answer: B. 225
The lowest common multiple of 25 and 45 is 225. Check: LCM × HCF = 225 × 5 = 1125 = 25 × 45.
671.
What is the LCM of 10 and 47?
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Answer: C. 470
The lowest common multiple of 10 and 47 is 470. Check: LCM × HCF = 470 × 1 = 470 = 10 × 47.
672.
What is the LCM of 6 and 34?
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Answer: B. 102
The lowest common multiple of 6 and 34 is 102. Check: LCM × HCF = 102 × 2 = 204 = 6 × 34.
673.
What is the HCF of 5 and 14?
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Answer: A. 1
The highest number dividing both 5 and 14 exactly is 1.
674.
What is the LCM of 22 and 30?
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Answer: C. 330
The lowest common multiple of 22 and 30 is 330. Check: LCM × HCF = 330 × 2 = 660 = 22 × 30.
675.
What is the LCM of 48 and 49?
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Answer: B. 2,352
The lowest common multiple of 48 and 49 is 2352. Check: LCM × HCF = 2352 × 1 = 2352 = 48 × 49.
676.
What is the LCM of 29 and 45?
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Answer: C. 1,305
The lowest common multiple of 29 and 45 is 1305. Check: LCM × HCF = 1305 × 1 = 1305 = 29 × 45.
677.
What is the HCF of 21 and 41?
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Answer: A. 1
The highest number dividing both 21 and 41 exactly is 1.
678.
What is the LCM of 9 and 21?
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Answer: B. 63
The lowest common multiple of 9 and 21 is 63. Check: LCM × HCF = 63 × 3 = 189 = 9 × 21.
679.
What is the LCM of 4 and 43?
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Answer: B. 172
The lowest common multiple of 4 and 43 is 172. Check: LCM × HCF = 172 × 1 = 172 = 4 × 43.
680.
What is the LCM of 36 and 41?
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Answer: C. 1,476
The lowest common multiple of 36 and 41 is 1476. Check: LCM × HCF = 1476 × 1 = 1476 = 36 × 41.