anonymous
  • anonymous
Came across this problem. I think the answer is 89. 1x6y7 is a 5 digit not divisible by 9. The number of ordered pair (x,y) satisfying this is?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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mathmath333
  • mathmath333
i m getting 76
anonymous
  • anonymous
did you count from the complement and subtract from total?
mathmath333
  • mathmath333
might be wrong

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mathmath333
  • mathmath333
yep
anonymous
  • anonymous
total is 100 right?
mathmath333
  • mathmath333
wait
mathmath333
  • mathmath333
yes sry m getting 95
mathmath333
  • mathmath333
100-5
anonymous
  • anonymous
these are the pairs that I got that makes the number divisible by 9 (0,4), (1,3), (2,2), (3,1) , (4,0) (4, 9), (5,8), (6,7), (7,6), (8,5), (9,4)
anonymous
  • anonymous
I might under counted
mathmath333
  • mathmath333
ur answer looks right i didnt count the later x,y pairs
anonymous
  • anonymous
oh ok :)
mathmate
  • mathmate
@souwing @mathmath333 I have the same 11 ordered pairs that @souwing posted.

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