If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

81 x 9 = 801. What must you do to make the this equation true?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Count the number of triangles in the picture below:

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

You measure my life in hours
I serve you by expiring
I vanish faster when I am thin
and slower when I am thick
The wind is my energy
What am I?

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

How many Watermelons are there in the below picture?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??