Why is a river so rich ?

I’m orange, I wear a green hat and I sound like a parrot. What am I?

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

What does an Island and the letter T have in common?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Can you find the company name in the pictogram below?

I cannot talk, but I always reply when spoken to. What am I?

Find the next number in the series below

21 32 54 87 131 ?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?