What has to be broken before you can use it?

Which is the smallest number that you can write using all the vowels exactly once?

What makes this number unique: 8,549,176,320?

what does the below rebus mean?

What is so fragile that saying its name breaks it?

Buy me, smell me or deliver me, I do not change.

Who am I?

A convention is held where all the big logicians are summoned. The master places a band on everyone's forehead. Now all of them can see others bands but can't see his own. Then they are told that there are different colours of bands. All the logicians sit in circle and they are further explained that a bell will ring at regular intervals. The moment when a logician knew the colour of band on his forehead, he will leave at the next bell. If anyone leaves at the wrong bell, he will be disqualified.

The master assures the logicians that the puzzle will not be impossible for anyone of them. How will the logicians manage ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Solve the counting riddle by identifying the number of triangles in the given picture.

What number divided by 4 is the same as that number minus 4?