If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

What makes this number unique: 8,549,176,320?

What four weights can be used to balance from 1 to 30 pounds?

When it's bad luck to meet a black cat?

Cristina leaves home and then she makes exactly 3 left turns and returns home where she found 2 girls wearing the mask.

Who are these two masked girls?

A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?