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MATH / If the three-digit number underline{2d2} is divisible by 7, what is d?

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problem

If the three-digit number $\underline{2d2}$ is divisible by 7, what is dd?
Plain-text mathematical notation (without MathML)
If the three-digit number $\underline{2d2}$ is divisible by 7, what is d?
Original LaTeX notation
If the three-digit number $\underline{2d2}$ is divisible by 7, what is $d$?

level

Level 2

type

Number Theory

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