When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Count the number of squares in the picture below.

Decode below rebus
D
N
A
T
S , D

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Name the three-letter word that can complete the below words:

A) L O _ _ _ E
B) E D U _ _ _ E
C) _ _ _ E R
D) _ _ _ T L E

Can you find the 09 errors in the picture below?

What is the largest number you can write with just 3 digits?

what does this picture(rebus) riddle means ?

An evil man kidnapped someone and made them take one of two pills. One was harmless, but the other was poisonous. Whichever pill the victim took, the kidnapper took the other one. The victim took their pill with water and died. The kidnapper survived. How did the kidnapper get the harmless pill?