Question

Check the divisibility 12129 by 11

Answer 1

$\huge{\underline{\mathfrak{\pink{AnSwEr}}}}$

$\huge\orange{\ddot\smile}$

Thus, 12129 is not divisible by 11.

Answer 2

$\underline {\pink { Divisibility \:by \:11 }}$

If the difference between the sum of digits in odd places and sum of digits in even places of a number is a multiple of 11 or equal to zero , then the given number is divisible by 11.

$Here , Given \: number 12129$

$i) Sum \:of \:the \:digits \:at \:odd \:places \: from \:the \:left = 1 + 1 + 9 = 11$

$ii) Sum \:of \:the \:digits \:at \:even \:places \: from \:the \:left = 2 + 2 = 4$

$Difference = 11 - 4 \\= 7 \: \blue { (Which \:is \:not \: divisible \:by \: 11 )}$

$\therefore The\: number \:12129 \:is \:not \\divisible \:by \:11.$

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