Look at this series: 70, 71, 76, __, 81, 86, 90, 91, ... What number should fill the blank? Choose the correct option
A) 70 B) 71 C) 80 D) 96 E) 84
70,71,76   80,81,86   90,91,96   ANSWER:80
<result>C</result>
Look at this series: 70, 71, 76, __, 81, 86, 90, 91, ... What number should fill the blank?