Solve below rebus puzzle?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Why 1729 is a magic number? Answer Logically.

Can you count the number of lines in the below picture?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

Find the hidden tiger in the given optical illusion ?

Kids with the most attentive eyes can spot a different watermelon in 4 seconds. Can you? Test your eyes now!

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?