TRY THESE
(The first one has been done for you.)
1. If the division N +5 leaves a remainder of 3, what might be the ones digit of N?
(The one's digit, when divided by 5, must leave a remainder of 3. So the one's digit
must be either 3 or 8.)
2. If the division N:5 leaves a remainder of 1, what might be the one's digit of N?
3. If the division N:5 leaves a remainder of 4, what might be the one's digit of N?
1.5.3 Divisibility by 2
Iere are the even numbers.
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, ...,
I here are the odd numbers.
1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, ...,
e see that a natural number is even if its one's digit is
2,4,6,8 or 0
number is odd if its one's digit is
1, 3, 5, 7 or 9
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