If 21x = 79x, what is the value of x?

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

Which is the correct shadow of the bird?

There are forty elephants and they have forty-fore heads. How can this be possible?

Find the value of "a" by solving the maths equation in the picture below:

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Count the number of squares in the picture below.