Question

1+2=21
2+3=36
3+4=43
4+5=?
​

Answer 1

Answer is 400!

Step-by-step explanation:

As we can see, placing 1 and 2 on reversing the digits is giving 21.

On the second step, for 36, 2 and 3 on multiplication gives 6 and squaring 6 gives 36.

Third step, placing 3 and 4 on reversing the digits is giving 43.

So, following the II step at fourth step gives us, 4 x 5 = 20, squaring 20 gives 400.

Answer is 400.

If we wish to go further onto Fifth step, then series on Left is 5 and right is 6, on reversing the digits we get, 65.