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

What Does this text mean:

important=important

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

I make two people out of one. What am I?

What three numbers, none of which is zero, give the same result whether they’re added or multiplied?

You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

If eleven plus two equals one, what does nine plus five equal?

Why Aeroplane windows are round?