Prime and Composite Numbers
SSAT Upper Level · Flashcards · Application
SSAT UPPER LEVEL · FLASHCARDS
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QUESTION
Identify whether
53
53
53
is prime or composite.
QUESTION
Identify whether
21
21
21
is prime or composite.
QUESTION
Identify whether
61
61
61
is prime or composite.
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ANSWER
61
61
61
is prime. No divisibility by primes up to
61
≈
7.8
\sqrt{61} \approx 7.8
61
≈
7.8
(2, 3, 5, 7).
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