Question

1+2=21,2+3=36,3+4=43,4+5=?​

Answer 1

The value of  (5 + 4) is equal to "54".

Step-by-step explanation:

We have,

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

1 + 2 = (1 + 2) × 7 + 0 = 21,

2 + 3 = (2 + 3) × 7 + 1 = 35 + 1 =36

3 + 4 = (3 + 4) × 6 + 1 = 42 + 1 = 43

4 + 5 = (4 + 5) × 6 + 0 = 54 + 0 = 54 = ?

Hence, the value of  (5 + 4) is equal to "54".