Question

What should come in place of question mark (?) in the following number series?

165        155      135      ?      65       15

A 118 Correct Answer Incorrect Answer
B 105 Correct Answer Incorrect Answer
C 128 Correct Answer Incorrect Answer
D 110 Correct Answer Incorrect Answer
E None of these Correct Answer Incorrect Answer

Solution

165 – 10 = 155 155 – 20 = 135 135 – 30 =  105 105 – 40 = 65 65 – 50 = 15

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