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?

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

What does man love more than life, and hate more than death or mortal strife; that which satisfied men want; the poor have, and the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

what does this picture(rebus) riddle means ?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?