How can I make a card deck with fixed-width cards?

Question

I want to make a responsive card deck using Bootstrap 4 fixed-width cards. Here I have posted the code below, but it\'s not responsive. Why?

Answer 1

Deck makes cards equal height.

Adding a row-deleting deck was correct. Adding col-lg-3 col-md-2 col-sm-12 will give a four-cards desktop, etc. down to one on a phone.

Set the height using the height of the largest number so an "OK" looks straight.