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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Find the next number in the sequence

5 12 24 36 ?

After undergoing a successful eye operation, A blind girl has just boarded a train to her home. The doctor asked her to open the bandages after 3 hours. On her train journey, she opened the bandages and within a fraction of the time she commits suicide by jumping off the train.

Though her operation was successful, Why did she commit suicide?

The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM

PS: You may start the number from 0.

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

Take one out and scratch my head, I am now black but once was red. What am I?

What country can make you shiver?