Number Systems
which of the following is a pair of co-primes: $$(32,62)$$
DoubtBuddy
Subjective Type
Which of the following pairs of numbers are co prime ? $$ 25 $$ and $$ 105 $$
Solution
$$ 25 $$ and $$ 105 $$
The factors of $$ 25 $$ are $$ 1 , 5 , 25 $$
The factors of $$ 105 $$ are $$ 1 , 3 , 5 , 7 , 15 , 21 , 35 , 105 $$
The common factors of $$ 25 $$ and $$ 105 $$ are $$ 1 , 5 $$
$$ \therefore \, $$ They are not co-prime.
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