What is the Surname of Barbie Doll?

What's a single-digit number with no value?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

There is a number which when you multiply by 3 and subtract 2 from the result, then the resulting number is the reverse of the actual number.

What is the smallest number that stands true on the statement?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

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

I ask Joseph to pick any 5 cards out of a deck with no Jokers.

He can inspect then shuffle the deck before picking any five cards. He picks out 5 cards then hands them to me (Jack can't see any of this). I look at the cards and I pick 1 card out and give it back to Joseph. I then arrange the other four cards in a special way, and give those 4 cards all face down, and in a neat pile, to Jack.

Jack looks at the 4 cards i gave him, and says out loud which card Joseph is holding (suit and number). How?

The solution uses pure logic, not sleight of hand. All Jack needs to know is the order of the cards and what is on their face, nothing more.

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?

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

What does below pictogram mean?