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

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different. How do you measure 45 minutes?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

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?

Why do people go to bed?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Find the hidden panda in the image below.

Chocolate costs 6 rupees and a Toy costs 5 rupees. If you have 32 rupees in total, how many chocolates and how many Toys can be purchased with that amount?

By what process could you make a 'Tea-Table' into food?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?