Difference between revisions of "2024 AMC 8 Problems/Problem 1"
Dreamer1297 (talk | contribs) (→Solution 2) |
Srinivasan21 (talk | contribs) (→Solution 1) |
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<cmath>222,222-22,222-2,222-222-22-2</cmath> | <cmath>222,222-22,222-2,222-222-22-2</cmath> | ||
− | <cmath> | + | <cmath> = 200,000 - 2,222 - 222 - 22 - 2 </cmath> |
− | <cmath> | + | <cmath> = 197778 - 222 - 22 - 2 </cmath> |
− | <cmath> | + | <cmath> = 197556 - 22 - 2 </cmath> |
− | + | <cmath> = 197534 - 2 </cmath> | |
− | + | <cmath> = 197532 </cmath> | |
− | ~nikhil | + | This means the ones digit is <math>\boxed{(B) \hspace{1 mm} 2}</math> |
+ | <math>\newline</math> | ||
+ | ~ nikhil | ||
~ CXP | ~ CXP | ||
Revision as of 15:01, 25 January 2024
Problem
What is the ones digit of
Solution 1
This means the ones digit is ~ nikhil ~ CXP
Solution 2
We can rewrite the expression as .
We note that the units digit of the addition is because all the units digits of the five numbers are and , which has a units digit of .
Now, we have something with a units digit of subtracted from . The units digit of this expression is obviously , and we get as our answer.
~ Dreamer1297