What is full of holes but still holds water?

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

Using eight eights and addition only, can you make 1000?

How many words can a pen with half refill write?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

Spot 5 differences in two Christmas tree below:

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

In this image, you can see three almost identical Doraemon images. Can you spot the odd one out from them?

Count the number of triangles in the below picture?