# Which one will be full first water | crack your brain – 2017

which one will be full first water | crack your brain

which one will be full first whatsapp | which one will be full first puzzle

4 bottles and water puzzle

There are two bottles of 10 liter; each completely filled with water. Now 2 persons having empty bottles of 4 liter and 5 liter want to take 2-2 liters of water. You can use only these 4 bottles (10 liter-full, 10 liter-full, 5 liter-empty, 4 liter-empty) to transfer the water. Wasting or throwing of water is not permitted. How can this be done?

Note: It is assumed that you can not measure water level by comparing water level, or by judging, it should be exact 2 liters of water finally in each 4 and 5 liter water bottle.

This puzzle is courtsey Kranthi Kumar, shared on our facebook page.

Four water bottles puzzle solution
WATER BOTTLES FIRST 10 LITER WATER BOTTLE SECOND 10 LITER WATER BOTTLE 4 LITER WATER BOTTLE 5 LITER WATER BOTTLE
Initial State 10 10 0 0
fill 5 liter bottle comppletely 10 5 0 5
fill 4 liter bottle completely from 5 liter bottle 10 5 4 1
empty 4 liter bottle to 2nd 10 liter bottle 10 9 0 1
transfer remaining 1 liter water from 5 liter bottle to 4 liter bottle 10 9 1 0
again fill 5 liter bottle from 2nd 10 liter bottle 10 4 1 5
fill 4 liter bottle completely from 5 liter bottle, it already had 1 liter water 10 4 4 2
empty 4 liter bottle to 2nd 10 liter bottle 10 8 0 2
fill 4 liter bottle with first 10 liter bottle 6 8 4 2
fill 2nd 10 liter bottle from 4 liter bottle 6 10 2 2