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

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

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

Do you know what I am?

In the figure that has been attached to this question, each digit represents a digit. The similar letters carry the same integer value. Can you expose the original digits?

Find the hidden tiger in the given optical illusion ?

Which is the smallest number that you can write using all the vowels exactly once?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months