Question

1+2=21
2+3=36
3+4=43
5+4=?

Answer 1

here are two answers for this question

1 is 45 and

2 is 420

I'm not sure for so comment me it is right or wrong

Answer 2

Step-by-step explanation:

bro it's not a series question or some logical- its clear:

1+2= 21 (Wrong answer)

2+3=36(again wrong)

and again 3+4 is not 43 it's wrong

so

5+4=9 because you did not use the word "If" at the starting