The average of 5 consecutive odd numbers A B C D and E is 55 . What is the product of A and D ?
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Let 5 consecutive odd numbers be
X
X+2
X+4
X+6
X+8
Their sum is 55
That is
5x + 20 =55
5x = 35
X = 7
So number A is x = 7
Number D is x+6 = 13
A x D = 7 x 13 = 91
X
X+2
X+4
X+6
X+8
Their sum is 55
That is
5x + 20 =55
5x = 35
X = 7
So number A is x = 7
Number D is x+6 = 13
A x D = 7 x 13 = 91
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