If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Six glasses are in a row. The first three are filled with milk and the last three are empty. By moving only one glass, can you arrange them so that the full and the empty glasses alternate?

Find the missing number in the sequence below:

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

The more you take me, the more you leave me behind.
Who Am I?

What word is pronounced the same if you take away four of its five letters?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?