Basic Maths and Reasoning MCQs (page 42 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 821–840.

821.
What is the LCM of 5 and 15?
Show answer
Answer: C. 15
The lowest common multiple of 5 and 15 is 15. Check: LCM × HCF = 15 × 5 = 75 = 5 × 15.
822.
What is the HCF of 14 and 27?
Show answer
Answer: A. 1
The highest number dividing both 14 and 27 exactly is 1.
823.
What is the LCM of 34 and 42?
Show answer
Answer: B. 714
The lowest common multiple of 34 and 42 is 714. Check: LCM × HCF = 714 × 2 = 1428 = 34 × 42.
824.
What is the HCF of 22 and 40?
Show answer
Answer: B. 2
The highest number dividing both 22 and 40 exactly is 2.
825.
What is the HCF of 23 and 39?
Show answer
Answer: A. 1
The highest number dividing both 23 and 39 exactly is 1.
826.
What is the LCM of 17 and 35?
Show answer
Answer: C. 595
The lowest common multiple of 17 and 35 is 595. Check: LCM × HCF = 595 × 1 = 595 = 17 × 35.
827.
What is the HCF of 28 and 35?
Show answer
Answer: B. 7
The highest number dividing both 28 and 35 exactly is 7.
828.
What is the LCM of 9 and 31?
Show answer
Answer: C. 279
The lowest common multiple of 9 and 31 is 279. Check: LCM × HCF = 279 × 1 = 279 = 9 × 31.
829.
What is the LCM of 16 and 18?
Show answer
Answer: C. 144
The lowest common multiple of 16 and 18 is 144. Check: LCM × HCF = 144 × 2 = 288 = 16 × 18.
830.
What is the HCF of 26 and 28?
Show answer
Answer: B. 2
The highest number dividing both 26 and 28 exactly is 2.
831.
What is the HCF of 36 and 60?
Show answer
Answer: B. 12
The highest number dividing both 36 and 60 exactly is 12.
832.
What is the HCF of 13 and 40?
Show answer
Answer: A. 1
The highest number dividing both 13 and 40 exactly is 1.
833.
What is the HCF of 35 and 40?
Show answer
Answer: B. 5
The highest number dividing both 35 and 40 exactly is 5.
834.
What is the LCM of 26 and 37?
Show answer
Answer: B. 962
The lowest common multiple of 26 and 37 is 962. Check: LCM × HCF = 962 × 1 = 962 = 26 × 37.
835.
What is the HCF of 18 and 24?
Show answer
Answer: C. 6
The highest number dividing both 18 and 24 exactly is 6.
836.
What is the LCM of 44 and 52?
Show answer
Answer: C. 572
The lowest common multiple of 44 and 52 is 572. Check: LCM × HCF = 572 × 4 = 2288 = 44 × 52.
837.
What is the HCF of 24 and 49?
Show answer
Answer: A. 1
The highest number dividing both 24 and 49 exactly is 1.
838.
What is the LCM of 7 and 24?
Show answer
Answer: C. 168
The lowest common multiple of 7 and 24 is 168. Check: LCM × HCF = 168 × 1 = 168 = 7 × 24.
839.
What is the HCF of 25 and 48?
Show answer
Answer: A. 1
The highest number dividing both 25 and 48 exactly is 1.
840.
What is the LCM of 41 and 56?
Show answer
Answer: C. 2,296
The lowest common multiple of 41 and 56 is 2296. Check: LCM × HCF = 2296 × 1 = 2296 = 41 × 56.