How many triangles can you find in this given picture?

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?

Why is the Hole below a Lock?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

My sock drawer has 26 blue socks, 13 pink socks, 33 green socks, and 12 red socks, how many socks would I have to pull out in the dark to be sure I had a matching pair?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

Name a key which is hardest to turn.