Question

1+2=21 ,2+3=36,3+4=43,4+5=?​

Answer 1

Answer:

1+2=21 ,2+3=36,3+4=43,4+5=9

Answer 2

Answer:

58

Step-by-step explanation:

A simple pattern is followed if you observe .

take the term 1+2=21

12 +9 = 21 (always abserve the first pattern first)

Now ,

23 + 13 = 36

34 + 39 = 43

45 + 13 = 58