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

81 x 9 = 801. What must you do to make the this equation true?

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

I am white when I am dirty, and black when I am clean. What am I?

The two towns are exactly 100 km apart. John leaves City A driving at 30 km/hr and Jacob leaves City B half an hour later driving at 60 km/hr. Who will be closer to City A when they meet?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

What does the below image rebus riddle means ?

Can you decipher the below rebus?

PBLUESAISNUERSES

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Andrew’s doctor gives him three pills and tells him to take one every half hour. How much time will have passed by the time Andrew’s taken all three pills?