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?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Pronounced as 1 letter, And written with 3, 2 letters there are, and 2 only in me. I’m double, I’m single, I’m black blue and grey, I’m read from both ends, and the same either way. What am I?

Can you name some countries which do not have the alphabet 'A' in them?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What work can one never finish?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Find the number of squares in the below picture

A man dies of old age on his 25 birthday. How is this possible?