Do You See It?

What does this mean?

CCCCCCC

There’s a one-story house in which everything is yellow. Yellow walls, yellow doors, yellow furniture. What colour are the stairs?

When it's bad luck to meet a black cat?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Spot 5 differences in two Christmas tree below:

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M