|
Question 390287: based on the pattern,what would be the ones digit in the pordut 12 time 8 ?
Answer by richard1234(7193)   (Show Source):
You can put this solution on YOUR website! It is quite possible to solve without multiplying or a pattern.
12 is congruent to 2 modulo 10 (the remainder when 12 divided by 10 is 2), and 8 is 8 modulo 10. Therefore, 12*8 == 2*8(mod 10) == 16(mod 10) == 6(mod 10) so the units digit is 6.
(The == symbolizes a triple horizontal line, which is used to denote equalities in modular arithmetic)
|
|
|
| |
