How many sides does a circle have?

You can hear me, but you can't touch or see me.

What am I?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

The chance of Mr John winning the lottery is 10%. All participants lined up and Mr John is 4th in the row. The first three participants lose the lottery.

What is the chance of Mr John now?

Can you solve the below geography rebus by decoding the below rebus ?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

Can you identify the Oscar-winning movie from the rebus below?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

Mr Black, Mr Gray, and Mr White are fighting in a truel. They each get a gun and take turns shooting at each other until only one person is left. Mr Black, who hits his shot 1/3 of the time, gets to shoot first. Mr Gray, who hits his shot 2/3 of the time, gets to shoot next, assuming he is still alive. Mr White, who hits his shot all the time, shoots next, assuming he is also alive. The cycle repeats. If you are Mr Black, where should you shoot first for the highest chance of survival?