457Δ is a 4-digit number with one of its digits represented by Δ. 457Δ is divisible by 3. Which of these is also a number divisible by 3?

Question

457Δ is a 4-digit number with one of its digits represented by Δ. 457Δ is divisible by 3. Which of these is also a number divisible by 3?

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Trung Dũng 4 years 2021-09-03T20:40:08+00:00 1 Answers 17 views 0

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  1. yenoanh
    0
    2021-09-03T20:41:17+00:00
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    Answer:

    by divisibility rule of 3 for a no. to be divisible by 3 there is necessary condition that sum of all digit is divisible by 3.

    so ans is 2 (smallest digit)

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )