Identifying Prime Factors: The Sure Inclusion in Two-Digit Numbers

Name: Video Solution: Identifying Prime Factors: The Sure Inclusion in Two-Digit Numbers
Description: Step-by-step video solution

I am a two-digit number $?0$

Which prime factor will surely appear among my first factors?

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00:00 Which factor definitely appears in the prime factors of the number?

00:04 The ones digit is 0, therefore the number is even

00:07 Every even number is divisible by 2

00:13 Actually, any number with tens digit and ones digit being 0 is divisible by 5

00:20 And this is the solution to the question

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I am a two-digit number $?0$

Which prime factor will surely appear among my first factors?

$2$

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Write all the factors of the following number: $$ 5 $$

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