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Question 1 of 10
1. Question
Find the difference between the LCM and HCF of 6 and 98.
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Question 2 of 10
2. Question
Highest common factor of 18 and 120 is
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Question 3 of 10
3. Question
The HCF of two numbers is 11 and their LCM is 343. If one of the number is 77, find the other.
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Question 4 of 10
4. Question
Four electronic devices make a beep after every 45 minutes, 1 hour, 1 hour 15 minutes and 1 hour 30 minutes respectively. All the devices beeped together at 12 noon. At what time will they beep together again?
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Question 5 of 10
5. Question
The largest number that divides 210, 315, 147 and 168 exactly is
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Question 6 of 10
6. Question
What is the greatest possible length of a scale that can be used to measure exactly the length 15 m, 12 m, 18 m?
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Question 7 of 10
7. Question
The greatest number of 5-digits, which is divisible by 16, 25, 40, 80 is _
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Question 8 of 10
8. Question
What is the least number which when reduced by 5 is divisible by each one of 21, 28, 36, 45?
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Question 9 of 10
9. Question
In a show every 8th customer was given a headphone and every 12th customer was given a T-shirt. What was the position of the first customer who received both a headphone and a T-shirt?
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Question 10 of 10
10. Question
Six bells commence tolling together and toll at intervals of 3, 6, 9, 12, 15, 18 seconds respectively. In 1 hr. 30 mins., how many times do they toll together?
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