What you cannot hold but it is yours?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

Why is a river so rich ?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

How many triangles can you count in the figure given?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?