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Primes, HCF and LCM - Prime Numbers and Composite Numbers

Primes, HCF and LCM - Prime Numbers and Composite Numbers

Secondary 1

Classify each number as prime, composite, or neither:
\[1,\quad2,\quad27,\quad37,\quad49.\] For each composite number, give a factor pair other than \(1\) and itself. Explain your classification of \(1\).

Solution:

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Answer:1: Neither; 2: Prime; 27: Composite \((27=3\times9)\) ; 37: Prime; 49: Composite \((49=7\times7)\).

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