Answer:
...the four consecutive odd numbers x, x+2, x+4 and x+6
Average = (x + x+2 + x+4 + x+6) / 4 = 16
(4x+12)/4=16
x+3 =16
x=16-3=13
the 4 odd numbers: 13; 15; 17; 19
product of lowest and highest number =
13*19=247
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