With the help clues provided in the image, can you find the 5 digit key?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A Car is crossing a bridge 2 miles long. The bridge can only hold 10000 lbs, which is the exact weight of the car. The Car makes it half way across the bridge and stops. A bird lands on the car. Does the bridge collapse? Explain.

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

In the four images below, can you find the odd one out?

They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

What two things can you never eat for breakfast?

There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?