What you cannot hold but it is yours?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

What month of the year has 28 days?

Before Mount Everest was discovered, what was the highest mountain in the world?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Known by all without exception, Forever here, for your protection, Sometimes strong, sometimes weak, Right after the night I come - hot and chic. And while millions of miles away, I always get to you, I find my way. No life around could do without me, Can you guess what I might be?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

Can you solve this picture maths equation?

Can you write down eight eights so that they add up to one thousand?