 # Logical Reasoning Questions And Answers :: Number Series: part3 Logical Reasoning Ability Test : Number Series QUESTIONS AND ANSWERS :: part3 : 6 to 10

 6. 572, 284, 140, 72, 32, 14, 5 14 32 72 5 140 ANSWER : 72 Explanation : . Series moves from the end following the pattern 5 x 2 + 4 = 14, 14 x 2 + 4 = 32, 32 x 2 + 4 = 68 and so on. Hence, the number 72 should be replaced by 68.
 7. 3, 5, 12, 39, 154, 772, 4634, 5 3 39 154 None of these ANSWER : 39 Explanation : . Series follows the pattern � 3 x 1 + 2 = 5, 5 x 2 + 2 = 12, 12 x 3 + 2 = 38; 38 x 4 + 2 = 154 and so on. Hence, number 39 should be replaced with 38.
 8. 4, 9, 19, 43, 90, 185, 375 9 19 90 185 None of these ANSWER : 19 Explanation : . Series follows the pattern : 4 x 2 + 1 = 9, 9 x 2 + 2 = 20, 20 x 2 + 3 = 43, 43 x 2 + 4 = 90 and so on. Hence, the number 19 should be replaced by 20.

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