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?

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2 Apples of One Kind

Three kinds of apples are mixed in a box. How many apples must you take to be sure of at least 2 apples of one kind?

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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?

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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

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