Unit 6 · Algebra
n>4 AND n<7 — How Many Whole Numbers?
Lesson 8 of 12
About this lesson
Same whole number in every box. Two constraints: □+4 > 8 → n > 4; □+□ < 14 → 2n < 14 → n < 7. Intersection: 5 ≤ n ≤ 6 → exactly 2 whole numbers work. n=4 fails the first (4+4=8 is NOT bigger than 8); n=7 fails the second (7+7=14 is NOT less than 14).
Chapters
Question
Alesha is doing this puzzle:
Write the same whole number into each box to make the sentences true. □ + 4 is bigger than 8. □ + □ is less than 14.
Alesha realises that there is more than one correct answer to the puzzle.
How many different correct answers are there?
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