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

A man stands on one side of a river, his dog on the other. The man calls his dog, who immediately crosses the river without getting wet and without using a bridge or a boat. How did the dog do it?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

There is a square piece of paper with a hole that is denoted by the circle on the top right side in the given picture. You have to cut the paper in a manner that it forms two and only two separate pieces of paper and then rearrange the pieces in a manner that the holes come in the centre of the paper.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _