Question

1. Find the greatest number of six digits exactly divisible by 6, 9, and 12.
2. Find the least number of five digits exactly divisible by 16, 18, 24 and 30
3. Find out the least number when divided by 9, 12, 16, and 30 leaves the remainder of 3 in each case.
4. Find the HCF of 144, 180 and 192
5. Give a number divisible by both 2 and 4 but not by 8
6. Which of the following are co-prime numbers?
i) 24 and 29 ii) 17 and 68 iii) 216 and 217

Answer 1

Answer:

1. 12
2. 30
3. 16

6)17and 68

4)144=2×2×2×3×11

180=2×2×3×3×5

192=2×2×2×2×2×2×3