I know a nine-letter word having only one vowel.
Do you ?

How many triangles can you find in this given picture?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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.

Nodes are shown below and you need to connect them based on the following rule: Every node can be connected to the number of nodes inside them, i.e. the first node there is a value of 1 which indicates that the first node can connect to exactly one node only.Can you do it?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

What does this Rebus Picture means ?

I am 5 letters long.
My first two tell you who I am
My first 3 could be a medicine
My last three reversed could be a young boy.
My 4th, 3rd and 2nd in that order could be a fruit drink.
If you have me you may hang me round your neck
WHAT AM I ?

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

What Adam and Eve do not have but the rest of the people have?