Question

next number in the series. 12, 15, 21, 24, 30, 33,39

answer is 54
please explain how its 54
plsss​

Answer 1

Answer:

answer is not 54 , the correct answer will be 51

Step-by-step explanation:

12+3= 15

15+6=21

21+3=24

24+6=30

30+3=33

33+6=39

39+3=42

42+6=48

48+3=51

hope my answers are correct ☺️☺️☺️

Answer 2

Answer:

anwer is not 54 it is 42

Step-by-step explanation:

because the step conuting done in the given question is +3and +6.like ,12+3=15, 15+6=21,21+3=24and the chain goes on.

therefore, the answer is 42