A bag contains 64 balls of eight different colours. There are eight of each colour (including red). What is the least number you would have to pick, without looking, to be sure of selecting 3 red balls?
When you say goodbye, I am what you need to tie. I come as a couple and go wherever you run. Who am I?
Prove that twice of ten is the same as twice of eleven.
Which English verb becomes past tense just by rearranging the letters?
I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
I had an infinite supply of water and 5 litres and 3 litres jars. How would you measure exactly 4 litres in the least number of steps?
Until it is measured, not known. Yet how you miss it when it has gone. What is it?
Find out which of the given views in the picture is accurately the top view of the given pyramid.
What can you hold in your right hand, but never in your left hand?
What does it mean?
The inventor of the Rubik’s Cube didn’t realize he’d built a puzzle until he scrambled it the first time and tried to restore it.
