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Logical Reasoning - Number Series - Discussion

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"Loneliness is the most terrible poverty."
- Mother Teresa
Directions to Solve

Look carefully for the pattern, and then choose which pair of numbers comes next.

20. 

10 20 25 35 40 50 55
[A]. 70 65[B]. 60 70
[C]. 60 75[D]. 60 65
[E]. 65 70

Answer: Option E

Explanation:

This is an alternating addition series, in which 10 is added, then 5, then 10, and so on.

Seema said: (Sat, Nov 13, 2010 09:24:44 AM)    
 
in this series first 10 is added , then 5 ,then 5, then 5 and then 10 and so on
Chinna said: (Wed, Nov 24, 2010 05:19:06 AM)    
 
its the alternative addition of 10 and 5...
10+10=20
20+5=25
25+10=35
35+5=40
40+10=50
50+5=55
55+10=65(required no)
65+5=70(required no)........
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