Which of the following pair is not congruent modulo 7? *
2 points
25,56
10,24
-31,11
-64,-15
Answers
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9
10,24 is answer........
Answered by
1
A is the correct option
We call two integers a and b "congruent modulo n" if the difference between them is a multiple of n. For example, the numbers 17 and 5 are modulo 3 congruent because 17 - 5 = 12 = 43, but the numbers 184 and 51 are modulo 19 congruent because 184 - 51 = 133 = 719.
The difference between 56 and 26 is consequently 30, which is not divisible by 7.
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