In which direction should the missing arrow point?

In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.

Can you calculate the percentage of students that study all four subjects?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you count the number of children in the picture below

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Which fur should we be getting from the Lion?

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?