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u have three jars of 19,13 & 7 litre capacities and the 13 & 7 ltr jars are filled withwater while the other is empty. u have to fill 2 jars with 10 ltrs of water each provided u can pour water from only one jar into another at a time... can u tell the sequence in which the water should be transferred so as to solve this puzzle???

Hello
Its not that simple :-)
Lets name the jars as X = 20 litre , Y = 13 litre , Z = 7 litre
I assume the jars are not graded with any scaling.

Elaboration
initially you have X = 0, Y = 13, Z = 7.
2nd step is X= 7, Y = 13 , Z = 0 means pour 7 litre jar into 20 litre one and other steps follow this.
So now I list all the steps:
X Y Z
0 13 7
7 13 0
19 1 0
12 1 7
12 8 0
5 8 7
5 13 2
18 0 2
18 2 0
11 2 7
11 9 0
4 9 7
4 13 3
17 0 3
17 3 0
10 3 7
The last step you know what to do.