Always in you, Sometimes on you;
If I surround you, I can kill you.
What am I?
You are given 16 witch hats. The hats are divided in four different colours – red, blue, green and yellow. Every colour has been assigned to four hats. Now each of the hat will be glued with a label of an arithmetic sign – ‘+’, ‘-‘, ‘x’ or ‘/’. But you can label one sign only once on one colour. In such an arrangement, the hats can be uniquely defined by its colour and symbol.
Can you arrange all the 16 hats in a 4x4 grid in a fashion that no two rows and columns have a repetition of colour or sign?
We have arranged four hats in the below picture to assist you.
It belongs to you, but other people use it more than you do. What is it?
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 is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?
What will be the best approach to finding all the prime numbers less than 75 that leave an odd reminder when we divide them with 5?
The following "Brain Bat" means Slow Down.
S
L
O
W
Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G
The horse jumps over the king.
Strangely there is absolutely no scratch on him.
Can anyone explain, how is this possible?
81 x 9 = 801. What must you do to make the this equation true?
If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.
How is this possible?
Solve this riddle by finding the odd one out from the rest.
The day before the 1996 U.S. presidential election, the NYT Crossword contained the clue “Lead story in tomorrow’s newspaper,” the puzzle was built so that both electoral outcomes were correct answers, requiring 7 other clues to have dual responses.