Beaker Puzzle

You have two beakers – one of 4 liters and other of 5 liters. You are expected to pour exactly 7 liters in a bucket. How will you complete the task?

Solution 1:

Step 1 : Fill the 5 liter beaker and empty it in the 4 liter beaker. You are left with 1 liter in the 5 liter beaker. Pour this 1 liter in the bucket.

Step 2 : Repeat step 1 and you will have 2 liters in the bucket.

Step 3 : Fill in the 5 liter beaker and add to the bucket.You now have 7 liters in the bucket.

So, in first step we pour 1 liter , in second step we again added 1 liter and in last we added 5 liters to the bucket. So, total water poured in bucket is 7 liter.

Solution 2:

Step 1: Fill in 4 liter beaker and pour 4 liter in a bucket.

Step 2: Again fill 4 liter beaker and empty it in 5 liter beaker. Now, again fill the 4 liter beaker and now we have 4 liter beaker filled and 5 liter beaker is having 4 liter of water.

Step 3: Now fill the 5 liter beaker with the 4 liter beaker and we will left with 3 liter in 4 liter beaker and pour this 3 liter in the bucket.

So, in first step we pour 4 liter and in last step we pour 3 liter so total water poured in bucket is 7 liter.