Grades 11-12 Video Solutions 2025-2025_11-12

Video Transcription

Video Summary

The problem involves determining the number of dots in the fifth shape of a sequence. The sequence pattern features two squares per step—each increasing in size. To solve, a formula is suggested: \(2 \times (n+1)^2\) where 'n' represents the step number. For the fifth shape, \(n=5\) yields \(2 \times 6^2 = 72\) dots. Alternatively, a recursive approach shows the progression involves repeating the previous step's dots and adding two rows of increasing size. Either method confirms the answer is 72 dots, matching option A.

Keywords

dot sequence

pattern formula

recursive approach

shape progression

mathematical solution