Logic Riddles

Logic riddles with answers involve looking at situations and making judgements about them by ruling out impossibilities. If you like solving maths puzzles, you will most probably like logic riddles as well.

1 Foot Strip

We have a 100 foot piece of ribbon. If it takes one second to cut it into a 1 foot strip how long would it take to cut the entire ribbon into one foot strips?

Riddle Answer

Jar Half Full of Bacteria

The number of bacteria in a large sealed jar doubles every minute. The bacteria will take an hour to fill the jar. When will the jar be half full?

Riddle Answer

20 Eyes

A book slipped from a man’s hands and fell on the floor with a loud noise. 20 eyes looked at him.

How many people were in the library?

Riddle Answer

Twenty Coins

Twenty men, women and children earn twenty coins between them. Each man earns 3 coins, each woman 1.5 coins and each child 0.5 coin. How many men, women and children are there?

Riddle Answer

Tina’s Age

Mark is 6 years old. His sister Tina is half of his age. So when Mark is 100 years old, how old is Tina?

Riddle Answer