 # Logical Reasoning Questions And Answers :: Number Series: part1 Exam2win > Reasoning Ability Main Page Logical Reasoning Ability Test : Number Series QUESTIONS AND ANSWERS :: part1 : 6 to 10

 6. 6, 126, ��., 9, 108, 12, 7, 133, 19, 12, 72, 6 21 23 30 35 40 ANSWER : 21 Explanation : . Number between 1st and 3rd, 4th and 6th, 7th and 9th is the product of the adjacent numbers. Hence the missing number will be 126/6 = 21.
 7. 2, 3, 5, 9, 17, 33, �.. 85 37 63 64 65 ANSWER : 65 Explanation : . Series moves with a difference of 1, 2, 4, 8, 16, 32. Hence, the missing number is 65.
 8. 6, 9, 15, 27, �.., 99 51 34 37 84 None of these ANSWER : 51 Explanation : . Series proceeds with a difference of 3, 6, 12, 24, 48, respectively. Hence, the missing number will be 51.
 9. 17, 7, 24, 19, 9, 28, ��., 8, 31, 27, 10, 37 20 21 18 12 23 ANSWER : 23 Explanation : . Each 3rd number is the sum of preceding two numbers. i.e., 17 + 7 = 24, 19 + 9 = 28, 23 + 8 = 31. Hence, the missing number will be 23
 10. 121, 112, ��., 97, 91, 86 102 108 99 104 101 ANSWER : 104 Explanation : . Series is written in descending order with a difference of 9, 8, 7, 6 and 5, respectively. Hence, the missing number will be 104.

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