If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What is the next number in this series?

4,12,84,3612....

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

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

It is a six-letter word.
The first four letters are me.
The second and last letters are the same.
The fourth second and last letter is payment.

Who is it?

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 never scared but became petrified and can’t live in a house but would die to make one. What am I?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

why number 8549176320 is one of a kind?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?