Grades 9-10 Video Solutions 2022-2022_9-10

Video Transcription

Video Summary

The problem involves six siblings with consecutive whole number ages, each asked about the oldest sibling's age. Five will point to the oldest sibling, while the oldest will point to the second oldest sibling. Their responses sum up to one less than six times the oldest sibling's age (6x - 1). To determine which sum is not possible, each option is increased by one and checked for divisibility by six. The number that isn't divisible by six indicates an impossible sum. The result shows 205 as this number, making option D the correct answer.

Keywords

siblings

ages

oldest

sum

divisibility