How many triangles can you find in this given picture?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

What do you think with the below Picture ?

How could a baby fall out of a twenty-story building onto the ground and live?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

I am quite hot but become too cold if you remove the first two letters. What am I?

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