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.

Cousin’s Age

If you change the order of the numbers in my cousin’s current age, you’ll get her age for next year but doubled. How old is she?

Riddle Answer

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

Bicycle Race

In a bicycle race, the man who came two places in front of the last man finished one ahead of the man who came fifth. How many contestants were there?

Riddle Answer