 # Logical Reasoning Questions And Answers :: Number Series: part3 Logical Reasoning Ability Test : Number Series QUESTIONS AND ANSWERS :: part3 : 1 to 5

 1. 4, 10, 23, 50, 104, 216, 439 4 10 23 104 216 ANSWER : 104 Explanation : . Series follows the pattern 4 x 2 + 2 = 10, 10 x 2 + 3 = 23, 23 x 2 + 4 = 50, 50 x 2 + 5 = 105, 105 x 2 + 6 = 216 and so on. Hence, the number 104 should be replaced by 105.
 2. 376, 188, 88, 40, 16, 4, -2 4 16 40 188 None of these ANSWER : 188 Explanation : . Series has been written in descending order with a differences of 192, 96, 48, 24, 12, 6 respectively. Hence, the number 188 should be replaced by number 184.
 3. 701, 348, 173, 85, 41, 19, 8 173 41 19 8 348 ANSWER : 348 Explanation : . Series follows the pattern from the right end as 8 x 2 + 3 = 19, 19 x 2 + 3 = 41, 41 x 2 + 3 = 85, 85 x 2 + 3 = 173, 173 x 2 + 3 = 349, 349 x 2 + 3 = 701. Hence, the number 348 should be replaced by 349.
 4. 444, 300, 200, 136, 87, 84, 80 200 136 87 80 None of these ANSWER : 87 Explanation : . Series has been written in descending order with a difference of 144, 100, 64, 36, 16 and 4 i.e. squares of even natural numbers. Hence, the number 87 should be replaced by number 100.
 5. 2, 3, 12, 37, 86, 166, 288 2 3 166 86 37 ANSWER : 166 Explanation : . Series moves with a difference of squares of odd natural numbers i.e., 1, 9, 25, 49, 81, 121. Hence, the number 166 should be replaced by number 167.

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