**31) 13, 35, 57, 79, 911, ?**

**Answer**: 1113

**Explanation**: 1 and 3, 3 and 5, 5 and 7, 7 and 9, 9 and 11, ….. So, 11 and 13 = 1113

**32) 1, 4, 10, 22, 46, ?**

**Answer**: 94

**Explanation**: + 3, + 6, + 12, + 24,….. So, 46 + 48 = 94

**33) 66, 36, 18, ?**

**Answer**: 8

**Explanation**: product of the digits of the preceding term So, 1 x 8 = 8

**34) 28, 33, 31, 36, ?, 39**

**Answer**: 34

**Explanation**: + 5, – 2, + 5, – 2,….. So, 36 – 2 = 34

**35) 1, 9, 25, 49, 81, ?**

**Answer**: 121

**Explanation**: 12, 32, 52, 72, 92,….. So, 112 = 121

**36) 1, 9, 25, 49, ?, 121**

**Answer**: 81

**Explanation**: 12, 32, 52, 72,….. So, 92 = 81

**37) 2,2,5, 13,28,?**

**Answer**: 52

**Explanation**: + 0, + 3, + 8, + 15, ….. i.e. + (l2 – 1), + (22 – 1), + (32 – 1), + (42 – 1), ….. So, 28 + (52 – 1) = 28 + 24 = 52

**38) 0, 2, 8, 14, ?, 34**

**Answer**: 24.

**Explanation**: + 2, + 6, + 6, + 10, + 10,….. So, 14 + 10 = 24

**39) 1, 5, 14, 30, 55, 91, ?**

**Answer**: 140

**Explanation**: + 4, + 9, + 16, + 25, + 36, ….. i.e. + 22, + 32, + 42, + 52, + 62,….. So, 91 + 72 = 91 + 49 = 140.

**40) 240, ?, 120, 40, 10, 2**

**Answer**: 240

**Explanation**: ÷ 1, ÷ 2, ÷ 3, ÷ 4, ÷ 5. So, 240 ÷ 1 = 240