Question

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

Answer 1

Answer:

4 + 5 = 54

Explaination:

From the given sequence, it is seen that in the addition, the numbers are consecutive and their answer is the no. with the tens digit as the highest no. in the addition and the ones digit is the lowest.

So, 1 + 2 = 21

2 + 3 = 32

3 + 4 = 43

Therefore, 4 + 5 = 54

Answer 2

The value of 4 + 5 is equal to "58".

Explanation:

We have,

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

To find, 4 + 5 = ?

The pattern follow:

Reverse digit, Reverse digit $+2^{2} ,$, Reverse digit, Reverse digit $+2^{2}$.

1 + 2 = Reverse digit = 21

2 + 3 = Reverse digit + $2^{2}$ = 32 + 4 = 36

3 + 4 = Reverse digit = 43

Similarly,

4 + 5 = Reverse digit + $2^{2}$= 54 + 4 = 58

Hence, the value of 4 + 5 is equal to 58.