What month of the year has 28 days?

What is more useful when it is broken?

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?

The dirtier I get, the whiter I look. Who am I?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What you cannot hold but it is yours?