Identify the largest prime number $y$ such that $3 y < 69$

23

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19

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207

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11

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Solution

The correct option is A $19$
Prime numbers are numbers that are divisible only by itself. For example: $1, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, . . . .$

$3 y < 69$
Dividing both sides by $3$ , we get
$y < 23$
The largest prime number less than $23$ is $19$
Hence, the largest prime number is $y = 19$ when $3 y < 69$

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