Question

1+2=21,2+3=36,3+4=43,4+5=?​

Answer 1

Step-by-step explanation:

1+2= 21

2+3= 36

3+4= 43

3+5= 520

Answer 2

Reverse 1 and 2 to make it 21 and put 3 front and multiply 2 and 3 so it is 36 so 4+5=50+5*4=50+20=70. I had same question in imo Please mark brain lies