How many times can you subtract the number 5 from 25?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

What does the below rebus riddle means?

Solve the mathematical equation in the picture below.

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

Keyboard words are not in alphabetical order, Why?

Do You See It?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

In the addition below, all digits have been replaced by letters.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?