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

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

Solve the following series:
AZ, GT, MN, __, YB

Rectify the following equality 101 - 102 = 1 by moving just one digit.

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

what does the below rebus mean?

I travel all around the world but always stay in the corner. What am I?

Two boys were admitted to a school. When the headmaster asks them about their parents, they tell him that they have same parents (father and mother). On further inquiry, it turns out that they both share the same date for their birthday.

"Are you twins," ask the headmaster.
"No," replies the boys.

Is it possible?