Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

Can you spot the man between the coffee bean in the picture below ?

Given that

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

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?

Identify the 10 differences between the two given pictures.

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

I know a 5-digit number having a property that With a 1 after it, it is three times as large as it would be with a one before it.

Guess the number?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

When we see 2 but call 10?