If you say my name, I will no longer exist. What am I?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

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

What month of the year has 28 days?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.

If a wheel has 54 spokes, how many spaces are there between the spokes?

What jumps when it walks and sits when it stands?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?