I have eight fingers and two thumbs but I do not live. What Am I?

What is at the end of a rainbow?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

If a wheel has 54 spokes, how many spaces are there between the spokes?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What is the riddle which can be asked all day with a different correct answer each time.

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.

O_er_t_o_

Complete the missing letters of the given word.

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

Here is a mathematical challenge that will not only engage your brain but also measure your quick-thinking abilities. If you can successfully identify the missing number in such a short span, you are demonstrating exceptional intellectual qualities.