Respuesta :

The difference between 73 and 68 is -5

The difference between 68 and 67 is -1

The difference between 67 and 62 is -5

The difference between 62 and 61 is -1

The next difference shoulb be -5, so we will subtract 5 from 61

and this will give 56

RELAXING NOICE
Relax