Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

How many words can a pen with half refill write?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

what's the probability of getting a king or a queen from a pack of 52 cards?

Can you solve below mathematical equation?

2^1234 - 2^1233

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

No matter how little or how much you use me, you change me every month. What am I?