A number that is no fewer than 13

In real math x ≥ 13.

but in math 14 15 16 17 18 19 20 21 22 23 24 ...

Step-by-step explanation:

basically you reword the wording

and you get 13 no smaller than thirteen

Answer:12 and down

Step-by-step explanation:

a number is no less than 13, it could equal 13. Next, A > 13. If a number is no less than 13, it could also be greater than 13. Now, put the two together: A ≥ 13, which says A is greater than or equal to 13