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

Name a key which is hardest to turn.

Can you count the number of squares in the figure below?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

What can you hold in your right hand, but never in your left hand?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

I don't get anymore wetter, no matter how much rain falls on me.

A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?