If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

You can see it everyday, But cannot touch it at will. What is it?

I am a white box having no key or lid.
Yet there is a golden treasure inside it.

What Am I?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

what does the below math rebus puzzle mean?

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.

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

How is the moon similar to a dollar?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.