Unit 6 · Algebra
$70.2□ vs $68.5△ — Biggest Difference?
Lesson 15 of 24
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About this lesson
Greatest difference = (top price as large as possible) − (bottom price as small as possible). Set □=9 and △=0.
Chapters
0:00Introduction
0:23The Question
1:08Defining the difference framework
1:34Maximising the first price
1:59Minimising the second price
2:26Calculating the ultimate difference
2:53Exam strategy — placeholder extraction shortcut
3:47Confirming the final option
Question
In the prices below, each shape represents a missing digit.
$70.2□
$68.5△
What is the greatest possible difference between the prices?
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