If any natural number is subtracted from same natural number, we get zero.

In $4215$, the face value of $2$ is $2$.

The greatest whole number cannot be obtained.

In $3857, 8$ is in the thousands place.

Write the predecessor of the given number: $25$

Write the predecessor of the given number: $79$

Write the predecessor of the given number: $520$

Write the predecessor of the given number: $1100$