Hi Everyone! Please Help! I really need help! Please answer as any as you can and he ones I already answered please stop if thy are prefect and if not please at the correct answer. Thanks! I really appreciate all of your peoples help

12. B

13. B

14. C

15. C

16. D

17. C

18. C

19. C

20. D

21. B

Step-by-step explanation:

12.

16/8 = 2

13.

12 - 4 = 8

12 - 6 = 6

(8 + 6)/2 = 7

15. 2000 x 1000 = 2,000,000

16. 999 + 9999 = 10,998

17.

24/4 = 6

6 x 5 = 30

18.

6 x 3 = 18

19. July 18th

20.

728 cannot divide evenly by 72

21.

1111 x 1111 = 1,234,321

biggest odd number is 3