In a certain series, each number except the first and second is obtained by adding the previous two numbers. If the first no is 2 and sixth no is 26, then the seventh number is:
A. 52
B. 46
C. 40
D. 42
Answer: Option D
Solution (By Examveda Team)
1st no. = 2 2nd no. = x (let) 3rd no. = x + 2 4th no. = x + x + 2 = 2x + 2 5th no. = x + 2 + 2x + 2 = 3x + 4 6th no., 3x + 4 + 2x + 2 = 26 5x = 20 x = 4 7th no. = 26 + 3x + 4 = 26 + 3 × 4 + 4 = 42This Question Belongs to Arithmetic Ability >> Number System
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