Discussion
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- Question
What is the LCM (least common multiple) of 57 and 93?
Options- A. 1767
- B. 1567
- C. 1576
- D. 1919
- Correct Answer
- 1767
- 1. The LCM of 16, 24, 36, 52 and 54 is?
Options- A. 5618
- B. 5216
- C. 432
- D. 5616 Discuss
- 2. What is the LCM of 64 and 56?
Options- A. 448
- B. 488
- C. 484
- D. 408 Discuss
- 3. What is the HCF of 6345 and 2160?
Options- A. 45
- B. 135
- C. 270
- D. 15 Discuss
- 4. Two numbers are in the ratio of 15 : 11. If their HCF is 13, then the greater number is?
Options- A. 195
- B. 125
- C. 175
- D. 125 Discuss
- 5. HCF and LCM of two numbers are 11 and 825 respectively. If one number is 275 find the other number.
Options- A. 53
- B. 45
- C. 33
- D. 43 Discuss
- 6. What is the HCF (highest common factor) of 133 and 112?
Options- A. 15
- B. 7
- C. 19
- D. 6 Discuss
- 7. What is the LCM of 120 and 450?
Options- A. 2400
- B. 1800
- C. 3600
- D. 4800 Discuss
- 8. Three friends J, K and L jog around a circular stadium and complete one round in 12, 18 and 20 seconds respectively. In how many minutes will all the three meet again at the starting point.
Options- A. 5
- B. 8
- C. 12
- D. 3 Discuss
- 9. If an object travels at five feet per second, how many feet does it travel in one hour?
Options- A. 30
- B. 3000
- C. 18
- D. 1800 Discuss
- 10. An observer 1.6 m tall is 20 3 away from a tower. The angle of elevation from his eye to the top of the tower is 30º. The heights of the tower is:
Options- A. 21.6 m
- B. 23.2 m
- C. 24.72 m
- D. None of these Discuss
Search Results
Correct Answer: 5616
Correct Answer: 448
Correct Answer: 135
Correct Answer: 195
Correct Answer: 33
Correct Answer: 7
Correct Answer: 1800
Correct Answer: 3
Explanation:
All the three friends will meet at the starting point again after X seconds, such that X is the LCM of the times taken by J, K and L to complete one round.
=> LCM of 12, 18 and 20 = 180 seconds = 3 minutes.
Hence 3 minutes is the answer.
Correct Answer: 1800
Correct Answer: 21.6 m
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