John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Find the missing letter in the last circle logically in the given below picture.

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

One night, Louis and Adam were sitting together. Adam was watching a movie while his wife Louis was reading a mystery book. Suddenly the power went out and Adam decided to go to bed, but strangely Louis kept on reading. There was no artificial light around, so Louis kept on reading. How come?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

You need to arrange three 7 and mathematical symbols to form number 1?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What is the largest number you can write with just 3 digits?

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