Simplify 12+7 in mod 5

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Odinaka_OTyro

Asked: January 7, 20212021-01-07T14:42:16+00:00 2021-01-07T14:42:16+00:00In: Arithmetic, Numbers and Combinatorics

Simplify 12+7 in mod 5

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Simplify 12+7 in mod 5

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Sengemegz · Accepted Answer · 2021-01-10T09:24:03+00:00

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Sengemegz Moderator

2021-01-10T09:24:03+00:00Added an answer on January 10, 2021 at 9:24 am

$12+7$ in $mod 5$
$\Rightarrow 12+7=19$ in $mod 5$
next look for the number that will multiple 5 to give 19 or a number close to 19 but not more than 19
$\Rightarrow 5 \times 3=15$
What must be added to 15 to make it 19? is 4
$\therefore 12+7\equiv 4$ in $mod 5$

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Simplify 12+7 in mod 5

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