I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

Can you make four (4) nines (9) equal 100?

What runs around the whole yard without moving?

In the figure, you can see nine stars. What you have to do is connect all of them by using just four line and without lifting your hand i.e. in a continuous flow.

Can you count the number of triangles inside a triangle?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

The barber of Town shaves all men living in the town. No man living in the town is allowed to shave himself. The barber lives in that town. Who then shaves the barber of the town?

How many triangles can you find in this given picture?