What occurs twice in a week, once in a year but never in a day?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

Solve the counting riddle by identifying the number of triangles in the given picture.

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

You need to move three matchsticks to form three squares. Can you do it?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

If 1+9+8=1, what is 2+8+9?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

John buys rice at Rs.60/kg from Britain and then sells them at Rs.5/kg in India. As a result of this, he becomes a millionaire. How come?