SOLUTION: When I turn my calculator upside down, the digits 0,1,2,5,6,8 and 9 still appear as digits. For example, when I turn my calculator upside down, 65259 remains the same- that is, it

Algebra ->  Finance -> SOLUTION: When I turn my calculator upside down, the digits 0,1,2,5,6,8 and 9 still appear as digits. For example, when I turn my calculator upside down, 65259 remains the same- that is, it       Log On


   

Question 995060: When I turn my calculator upside down, the digits 0,1,2,5,6,8 and 9 still appear as digits. For example, when I turn my calculator upside down, 65259 remains the same- that is, it stays 65259. How many whole numbers between 100 and 1000 remains the same when I turn my calculator upside down?
A. 6x7
B. 6x5
C. 6x5x6
D. 6x7x6
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

the first digit can be any of 1, 2, 5, 6, 8, 9
the last digit is determined by the first digit (has to be it's "flip")
the middle digit has to be one that flips to itself: 0, 1,+2, 5, or 8
6+%2A+5%2A+1+=+30 possible numbers
so, answer is:
B. 6%2A5 or 30