Grades 7-8 Video Solutions 2021-video 2021 7-8/4

Video Transcription

Video Summary

The problem asks for the count of four-digit numbers whose digits are consecutive and in ascending order from left to right. Starting with the digit 1, the corresponding number is 1,234. Continuing this pattern, the numbers progress as 2,345, 3,456, and so on, up until 6,789. Digit arrangements beyond 6,789 aren't possible as there isn't a subsequent digit larger than 9. Consequently, there are six such four-digit numbers: 1,234; 2,345; 3,456; 4,567; 5,678; and 6,789.

Keywords

consecutive digits

ascending order

four-digit numbers

number pattern

digit sequence