If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

Can you find the six hidden animals in the picture below?

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

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

All of Jacob's shoes are red except two.
All of Jacob's shoes are green except two.
All of Jacob's shoes are yellow except two.

How many shoes does Jacob have?

Can you count the number of squares in the figure below?