When we see 2 but call 10?

How many triangles are there on the puzzle below?

Can you find a rabbit in the given picture?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

I add 5 to 9 and get 2. The answer is correct, so what am I?

As shown in the image, the nine Dogs are square fenced. By constructing just two square fences can you make sure that two Dogs cannot meet each other without crossing the fence?

An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?