Question

which one is smallest one digit number

Answer 1

it depends upon what kind of number u r looking for,

for natural numbers the smallest one digit number is 1

for whole number the smallest one digit number is 0
 
for integers the smallest one digit number is -9

Answer 2

Given:

One digit number

To find:

The smallest 1 digit number in the series

Answer:

The smallest one digit number is -9

The order of the series is as follows:

- 9, - 8, - 7, - 6, - 5, - 4, - 3, - 2, - 1, 0, … … … … … …

We can go for -10, -11, -12, ... ... ... but it is a two digit number so we cannot go for it.