I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

Find the missing letter in the last circle logically in the given below picture.

Count the number of triangles in the below picture?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

Which fur should we be getting from the Lion?

These types of puzzles are known as charades. What you have to do is to find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be the 'office'.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

John was piloting a plane behind a car but was never able to overtake it. Why?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?