... 4, 7, 25, 10, __, 20, 16, 19, What number should fill the blank?a. 13b. 15c. 20d. 2865. Look at this series: 72 , 76 , 73 , 77 , 74 , __, 75 , What number should fill the blank?a. 70 b. 71 c. 75 d. ... 70 b. 71 c. 75 d. 78 66. Look at this series: 70 , 71 , 76 , __, 81, 86, 70 , 91, What number should fill the blank?a. 70 b. 71 c. 80d. 96 67. Look at this series: 664, 332, 340, 170 , __, 89, What ... 35 40 50 55a. 70 65b. 60 70 c. 60 75 d. 60 65e. 65 70 32. 40 40 31 31 22 22 13a. 13 4b. 13 5c. 4 13d. 9 4e. 4 433. 17 17 34 20 20 31 23a. 26 23b. 34 20c. 23 33d. 27 28e. 23 2834....