Challenge: The 24 Game or Countdown Numbers Game

Create code that can solve a math algorithm for either the 24 Game or Countdown Numbers Game, both are about the same problem but the 24 Game would be considered a bit easier and then maybe even implement (if you even need to) the changed to turn it into a countdown game.

Googling the 24 Game, it seams like this is a popular coding challenge, as you can see here
https://www.rosettacode.org/wiki/24_game

and with a little bit of help I think the Countdown Numbers Game could also be included.

Countdown Numbers Game:
https://youtu.be/6D5eVsX-JL8