17^27 has a units digit of:
1
2
3
7
9
qa is 3 but i chose 9.
Here is my reason for choosing 9. 17 end in 7 and power of 27 end is 7 therefore I multipplied them together. THis technique I learned from the manhattan gmat lesson. THe corect way is to find the sequence pattern and count up to 27. why did i do mine wrong i wanted to use the manhattan way. can someone show me where i went wrong.
1
2
3
7
9
qa is 3 but i chose 9.
Here is my reason for choosing 9. 17 end in 7 and power of 27 end is 7 therefore I multipplied them together. THis technique I learned from the manhattan gmat lesson. THe corect way is to find the sequence pattern and count up to 27. why did i do mine wrong i wanted to use the manhattan way. can someone show me where i went wrong.
Appetite for 700 and I scraped my plate!
