What has to be broken before you can use it?
A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log. Can you calculate the weight of the entire wooden log?
A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?
Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months
What demands an answer, but asks no questions
The dirtier I get, the whiter I look. Who am I?
I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?
What jumps when it walks and sits when it stands?
What has many keys but can’t open a single lock?
I am a white box having no key or lid. Yet there is a golden treasure inside it. What Am I?
I make two people out of one. What am I?
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.