If we have 2 buckets one is 5ltr and 2nd is 7ltr. we need 6ltr water from a well.how we get ?

1. Fill the 5l bucket.
2. Pour all 5l into the 7l bucket.
3. Fill the 5l bucket.
4. Fill the 7l bucket with water from the 5l bucket.
5. Remove all of the water in the 7l bucket.
6. Pour the remaining 3l (in the 5l bucket) into the 7l bucket.
7. Fill the 5l bucket.
8. Fill the 7l bucket with water from the 5l bucket.
9. Remove all of the water in the 7l bucket.
10.Pour the remaining 1l (in the 5l bucket) into the 7l bucket.
11. Fill the 5l bucket.
12. Pour all 5l into the 7l bucket. Voila! 6 litres!

5l bucket : 7l bucket
5 : 0
0 : 5
5 : 5
3 : 7
3 : 0
0 : 3
5 : 3
1 : 7
1 : 0
0 : 1
5 : 1
0 : 6