Name a key which is hardest to turn.

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Which Travels Faster? Solve below famous picture riddle:

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

What is full of holes but still holds water?

Joseph buys three kinds of chocolates for 100 rupees. The first one is priced at 5 rupees, second one at 3 rupees and third one at 0.5 rupees.

If he bought 100 chocolates in total, how many pieces do you think he bought each chocolate?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Can you identify if it's a murder or a suicide ?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.