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Sunday, August 21, 2011
QUESTION 10
In a 3 digit number the sum of the digits is 15. The tens digit is one less then the units digit. Which of the following numbers cannot be a digit in the hundreds place?
a) 5
b) 4
c) 6
d) 8
5
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ReplyDeletex+2z=16; x=16-2z implies x cant be negative so answer is 5 :)
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