Question

how many four digit numbers have the property that their digits, from left to right, are consecutive and in ascending order ?
a.5
b.6
c.7
d.8
e.9

Answer 1

Resposta:

b) 6

Explicação passo a passo:

1234, 2345, 3456, 4567, 5678 & 6789

Answer 2

Resposta: 7

Explicação passo a passo:

If counting the "0"

1- 0123

2- 1234

3- 2345

4- 3456

5- 4567

6- 5678

7- 6789