It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

John had a bag containing colourful marbles. The colours are red, green and blue. The total number of marbles he had in his bag was 60. There are 4 times as many red marbles as green marbles. 6 more blue marbles than green marbles. How many marbles of each colour did John have?

John was piloting a plane behind a car but was never able to overtake it. Why?

Kids with the most attentive eyes can spot a different watermelon in 4 seconds. Can you? Test your eyes now!

Before Mount Everest was discovered, what was the highest mountain in the world?

I am dry when I go inside, but wet when I am pulled outside.
The longer I am inside, the stronger I get
When I am completely out, I am wet and I literally sag
Who am I?

I make two people out of one. What am I?

What do you see here? Your task is to find three words hidden in the optical illusion

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

Can you write down eight eights so that they add up to one thousand?