Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What can you hold in your right hand, but never in your left hand?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

Can you find out which number multiplied by itself will give the output as 12345678987654321?

Different lights make me strange by changing me into different sizes. What am I?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

What is the next number in this series?

4,12,84,3612....

How many triangles are there on the puzzle below?