How much will a 38° angle measure when looked at under a microscope that magnifies ten times?

Prove that twice of ten is the same as twice of eleven.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

I am white when I am dirty, and black when I am clean. What am I?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Identify The phrase in the picture.

Which Travels Faster? Solve below famous picture riddle:

To attend world science seminar, A famous chemist from Mexico visit
London. In the lab, the scientist was killed and his six assistants were under suspicion of killing the chemist.
Name of six assistants: Austin, Wayne, Dege, Oscaru, Lingard, and Rojo.
He left a note "76-20-44 79-16-22-7"

A local detective Jack was called to solve the case,

After reading the note, Jack instantly asked the police to arrest the murderers.

Who are the murderers?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10