Why is the longest human nose just 11 inches?

In the image given, you can find several triangles. Can you count them all?

What can you hold in your right hand, but never in your left hand?

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?