hard riddles
number riddles
random riddles
random riddles
100

what is so fragile that saying its name breaks it?

silence

100

what are three numbers, none of which is zero, give the same result when whether they are added or multiplied?

one, two and three

100

What is black when it is clean and white when it is dirty?

a chalk board 

100

what has to be broken before you use it? 

an egg

200

a man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?

The river was frozen

200
which is heavier 1kg of bricks or 1kg of feathers?

neither, they both weigh the same

200

What building has the most stories?

The library

200

I am tall when I'm young and I am short when I'm old. What am I?

a candle

300

what can fill a room but takes up no space?

light

300

I am a odd number, I take away one letter and I become even. What number am I?

seven

300

what has legs but can't walk?

a table

300

What is always in front of you but can't be seen?

your future

400

The more you take, the more you leave behind. What are they?

Footsteps

400

If two's company, three's a crowd, what are four and five?

nine

400

If you drop me I'm sure to crack, but give me a smile and i'll always smile back, what am I?

a mirror

400

What goes up but never comes down?

your age

500

what do the numbers 11 ans 88 have in common?

They both look the same upside- down and backward.

500

There was a plane it crashed every single person died, who survived? 

The married people