Interactive practice questions
Is $13$13 prime or composite?
$13$13 is a composite number.
A
$13$13 is a prime number.
B
Easy
< 1min
Is $15$15 prime or composite?
Easy
< 1min
True or False?
$54$54 is a prime number.
Easy
< 1min
Is $77$77 prime or composite?
Easy
< 1min
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