Recognizing Patterns
Pre-Algebra · Flashcards
PRE-ALGEBRA · FLASHCARDS
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QUESTION
A row of hexagons has perimeters 6, 10 and 14 for 1, 2 and 3 hexagons. What is the perimeter for 8 hexagons?
QUESTION
What is the units digit of
2
10
2^{10}
2
10
?
QUESTION
What is the units digit of
3
8
3^8
3
8
?
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ANSWER
1. The units digits of powers of 3 cycle 3, 9, 7, 1, and 8 is a multiple of 4.
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