What does below pictogram mean?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

If it took eight men ten hours to build a wall, how long would it take four men to build it?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Can you count the number of triangles in the picture below?

What you cannot hold but it is yours?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

What Deficiency does the below rebus represent?

VIT_MIN

In the Thar desert, 3 men found a big 24L Jar is full of water. Since there is a shortage of water so they decided to distribute the water among themselves such that they all have equal amounts of it. But they only have a 13L, a 5L and an 11-litre Jar.

How do they do it?