Count the Triangle in the figure given below:

With the help clues provided in the image, can you find the 5 digit key?

In a Society, there are over 100 flats.

Flat 1 is named the first flat.
Flat 2 is named the second flat.
Flat 3 is named the third flat. And So On.....

A visitor decides to walk through all the flats, and he finds all the flats except flat 62.
Anmol later founds that the locals of the town have given it another name.

What is the name of the Flat?

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

What is the end of everything?

I have branches, but no fruit, trunk or leaves. What am I?