What does does this rebus picture means ?

What is next number in the pattern below:

131 517 192 123 ?

Can you count the number of triangles in the given figure?

A man is surviving on an island along with his friend. They have been starving for four days for food. Suddenly, they find a fisherman. The friend goes with the fisherman in order to catch the fish (if they can find any).

The fisherman returns after some time but he is alone and has some salmon that he had prepared. When asked, the fisherman tells him that his best friend fell off the boat and drowned in the water. Starving for so long, he eats the meal while crying for his friend.

After being rescued, he goes to a diner and orders salmon. When he eats his meal, he jumps and commits suicide. Why did he do it?

You are confined in a room and given two metal rods. Out of these two rods, one is magnet and the other is the iron rod. They look starkly similar. You don't have any other metal object in the room.

How will you decide which one of those is magnet?

How is the moon similar to a dollar?

Can you make a six-letter word using the letters N, A and B ?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

Which tank will fill first?