Symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are used to write numbers and are called digits.

More About Digit

1, 2, 3, 4, 5, 6, 7, 8, 9 are called single digit numbers.
10, 11, 12, 13 . . . 99 are called 2-digit numbers.
101, 102 . . . 999 are called 3-digit numbers and so on.

Example of Digit

Among 325, 68, 7456, and 124, 7456 is the 4-digit number.
The largest 4-digit number is 9999.
The largest 5-digit number is 99,999.

Video Examples: Multiplying Two-Digit Numbers

Solved Example on Digit

Ques: Choose the largest number using the 3 digits 455.

Choices:

A. 554
B. 545
C. 455
D. 445
Correct Answer: A

Solution:

Step 1: The possible numbers that can be written using the three digits 4, 5, and 5 are 455, 545, and 554.
Step 2: Among these numbers 554 is the largest.
Step 3: So, the largest number that can be written using the three digits 4, 5, and 5 is 554.