Count the number of triangles in the picture below:

People put me on the table and cut me but do not eat me. What am I?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

What you cannot hold but it is yours?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Consider all the numbers between 1 and 1 million. Among all these numbers, there is something very special about the number 8 and the number 2202. What is it?

Why do you find that most of the buildings are deprived of the 13th floor?

What four weights can be used to balance from 1 to 30 pounds?

What runs around the whole yard without moving?

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?