Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

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.

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Next Number in the Series,

5, 16, 49, 104, ?