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

Take away the whole and some still remain. What is it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

John walks into the daily grocery shop and steals a $100 bill from the shop. An hour later John returns to the shop and buys some daily products for $40. John pays the owner the $100 bill and therefore the owner returns him $60.

How much money did the owner lose?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

I make two people out of one. What am I?

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?”

Christina makes tasty toast in a small pan. After toasting one side of a slice, she turns it over. Each side takes 30 seconds. The pan can only hold two slices.
How can she toast both sides of three slices in 1 & 1/2 instead of 2 minutes?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.