Can you replace the question mark with the correct letter?

6 + 6 + 6 = N
7 + 7 + 7 = E
8 + 8 + 8 = R
0 + 0 + 0 = ?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

If two's company, and three's a crowd, then whats four and five ?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Find the next number in the sequence

1, 2, 6, 21, 88, __?