Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

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

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

What does this rebus mean?

O
N
C
E
TIME

What has many teeth, but cannot bite?

What does below Rebus say?

XLR8

Get total of 120 by using five zeros 0,0,0,0,0 and any one mathematical operator.
Do you ?

What can you hold in your right hand, but never in your left hand?