You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

What's a single-digit number with no value?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

I hide my treasure in the ground, my tail is big and fluffy. If you spot me in a tree, please don’t call me scruffy. What am I?

Can you count the number of squares in the figure below?

There is a circular car race track of 10km. There are two cars, Car A and Car B. And they are at the exact opposite end to each other. At Time T(0), Both cars move toward each other at a constant speed of 100 m/seconds. As we know both cars are at the same speed they will always be the exact opposite to each other.
Note, at the center, there is a bug which starts flying towards Car A at time T(0). When the bug reaches car B, it turns back and starts moving towards the car A. The speed of bug is 1m/second. After 5 hours all three stop moving.
What is the total distance covered by the bug?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What makes this number unique: 8,549,176,320?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?