**26) VI, 10, V, 11, __, 12, III, … What number should fill the blank?**

**Answer**: IV

**Explanation**: In the Roman numeral pattern, each number decreases by 1. In the Arabic numeral pattern, each number increases by 1.

**27) (1/9), (1/3), 1, ____ , 9, … What number should fill the blank?**

**Answer**: 3

**Explanation**: each number is 3 times the previous number.

**28) 83, 73, 93, 63, __, 93, 43, … What number should fill the blank?**

**Answer**: 53

**Explanation**: every 3rd number is 93 other each number is -10 by previous number So, 63 – 10= 53

**29) 15, __, 27, 27, 39, 39, … What number should fill the blank?**

**Answer**: 15

**Explanation**: + 12, and each number in the series repeats itself SO, 15 repeated next time

**30)72, 76, 73, 77, 74, __, 75, … What number should fill the blank?**

**Answer**: 78

**Explanation**: This series alternates the addition of 4 with the subtraction of 3