You have a 5-litre jug and a 3-litre jug. How can you measure exactly 4 litres?

Type:Logic

Need a hint?

One helpful clue
Show hint

Hint: Think about the exact wording and the worst-case situation.

Reveal answer

The answer is

Fill 5, pour into 3, empty 3, pour remaining 2 into 3, fill 5, then top up the 3-litre jug.

Answer guide

Why this answer works

Read the explanation

After the 3-litre jug already has 2 litres, it needs 1 more litre. Pouring 1 litre from the full 5-litre jug leaves exactly 4 litres.

#what-am-iType: Logic#classic logic puzzle#teens and adults

Keep guessing

Related riddles

Random riddle

What is the maximum number of pieces from 3 straight cuts across a round cake, if each cut crosses all previous cuts inside the cake?

Type:Logic
Reveal answer

The answer is

7

Hints and details

A cube is painted on all sides and cut into 27 equal smaller cubes. How many small cubes have paint on exactly one face?

Type:Logic
Reveal answer

The answer is

6

Hints and details

Ten seconds before midnight I make a room loud; ten seconds before an exam I make it silent. Same numbers, different feeling. What am I?

Type:LogicTime
Reveal answer

The answer is

A countdown

Hints and details