Question

1+2=21
2+3=36
3+4=43
4+5=?​

Answer 1

Answer:-

4 + 5 = 58

Reason:-

We can clearly see that the first digit of the sum of each number is in a sequence, i.e 2, 3, 4••• So first digit should be 5 and after observing more closely we can see that the difference between 2nd digit of 1st and 2nd number is 5 and difference between 2nd and 3rd number is 3. So if the pattern continues, then the difference between 3rd and 4th number should be 5. Hence, 2nd digit of the number = 3 + 5 = 8

Hence, the required number is 58