I am an odd number. Take away a letter and I become even. What number am I?

Can you find out the total number of triangles in the given figure?

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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Why is 6 afraid of 7?

Alex is stranded on an island covered in forest.
One day, when the wind is blowing from the west, lightning strikes the west end of the island and sets fire to the forest. The fire is very violent, burning everything in its path, and without intervention the fire will burn the whole island, killing the man in the process.

There are cliffs around the island, so he cannot jump off.

How can the Alex survive the fire? (There are no buckets or any other means to put out the fire)

A sundial has the fewest moving parts of any timepiece. Which has the most?

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?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?