Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.
Can you find out the remainder when 3^300 is divided by 5?
The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?
It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?
Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?
Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?
I am a mother. However, I never give birth. I am a father. However, I never nurse my children. Wandering is not possible for me, but standing still happens occurs rarely. Who am I?
A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result. Can you find how bias is the floor in this case?
Why Aeroplane windows are round?
The more you take me, the more you leave me behind. Who Am I?
In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?
In the 1920s, people feared that crossword puzzles would contribute to illiteracy.
