Riddles
BRAIN TEASERS
100

What can be touched but can't be seen?

Air

200

What has 88 keys but cannot open a single door?

Piano

300

What has 13 hearts?

A deck of playing cards

400

 I am the beginning of everything, the end of everywhere.I'm the beginning of eternity, the end of time & space. What am I?

Letter E

400

How can 8 + 8 = 4?

8 AM + 8 hours= 4 o'clock

500

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

The letter N