Which country gets ill every time?

What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Why do you find that most of the buildings are deprived of the 13th floor?

Count the Triangle in the figure given below:

John is the son of Jacob.
So,
Jacob is the_____of John's father?

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?

A Car driver was heading down a street in Washington. He went right past a stop sign without stopping, he turned left where there was a 'no left turn' sign and he went the wrong way on a one-way street. Then he went on the right side of the road past a cop car. Still, he didn't break any traffic laws. Why not?

Why is the Hole below a Lock?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?