SOLUTION: When the number 168 is rotated half a turn, it becomes 891. Which of the following numbers when rotated half a turn is decreased by 12? A)81 B)69 C)16 D)98

Algebra ->  Circles -> SOLUTION: When the number 168 is rotated half a turn, it becomes 891. Which of the following numbers when rotated half a turn is decreased by 12? A)81 B)69 C)16 D)98      Log On


   

Question 475352: When the number 168 is rotated half a turn, it becomes 891. Which of the following numbers when rotated half a turn is decreased by 12?
A)81
B)69
C)16
D)98
Found 2 solutions by mananth, Edwin McCravy:
Answer by mananth(16949) About Me  (Show Source):
Answer by Edwin McCravy(20086) About Me  (Show Source):
You can put this solution on YOUR website!

Write each one on paper and turn the paper upside down.

A)81 becomes 18 when turned upside-down, and decreases by 63, not by 12

B)69 stays 69, and neither decreases nor increases, so it doesn't decrease by 12

C)16  becomes 91 when turned upside-down, and increases by 75, it doesn't decrease by 12

D)98 becomes 86 when turned upside-down, and decreases by 12.  So D) is the answer.

Edwin