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प्रश्न
9142x a multiple of 4?
उत्तर
9142x is multiple of 4
⇒ 9 + 1 + 4 + 2 + x is a multiple of 4
⇒ 16 + x = 0, 4, 8, ………
x = -8, -4, 0, 4, 8
Since, x is a digit
4, 8
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