Read the question

Write one thousand, and twenty-one as a number.

Expressing numbers of up to four digits using words
The question content

Then answer and click the Submit button to send the answer and view the results.

In case of an incorrect answer

Expressing numbers of up to four digits using words - answer incorrect
The answer result

View the answer result
Then click the Solution To view instructions on how to answer correctly.

Expressing numbers of up to four digits using words - solution 1
Step 1
Expressing numbers of up to four digits using words - solution 2
Step 2

In case of a correct answer

Expressing numbers of up to four digits using words - answer correct
Correct result

Check the correct result
and then press the Next to continue answering the next question.