Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Find Wrong No. (Q.No. 4)
Directions to Solve
Find out the wrong number in the series.
4.
445, 221, 109, 46, 25, 11, 4
Answer: Option
Explanation:
Go on subtracting 3 and dividing the result by 2 to obtain the next number.
Clearly, 46 is wrong.
Discussion:
23 comments Page 2 of 3.
Kamlesh said:
8 years ago
The general form of the series is sigmal of GI (n\2) -1 put n=445 you will get 222.5 but GI of 222.5 is 222 subtract 1 from it you will get 221 and then put 221 on the series and so on.
Apoorv said:
9 years ago
Sum every digit of every number in the series.
4 5 1 1 7 2 4. There's anyhow increase and decrease in the difference of number. Except 1 at the 4th place. Which corresponds to 46!
4 5 1 1 7 2 4. There's anyhow increase and decrease in the difference of number. Except 1 at the 4th place. Which corresponds to 46!
Laxmi said:
1 decade ago
series is wrong....think so
if wrong number is 46
it should be 445,221,109,53,46(45),21,9,3...
if wrong number is 46
it should be 445,221,109,53,46(45),21,9,3...
Viji said:
9 years ago
Good explanation, thank you @Nagendramurthy.
Albert said:
9 years ago
Very tough to find the answer.
Srinithi said:
1 decade ago
Its really a tough question. Could not judge the way in which the series is written?
BoB said:
1 decade ago
Hi but how did you find that it must be subtracted by 3 and multied by 2, seeing the question ? can any one help please.
Adesh said:
1 decade ago
Yes 109 is wrong because 74* 35=2590 which is not the next number in the given series?
Satya said:
1 decade ago
I had solved this problem like this.
Starting from the end.
4.
4+7=11,
11+14=25,
25+21=46,
46+28=74. So 109 is wrong.
Can anybody say whether the way is correct are not? and why?
Starting from the end.
4.
4+7=11,
11+14=25,
25+21=46,
46+28=74. So 109 is wrong.
Can anybody say whether the way is correct are not? and why?
Priyanka said:
1 decade ago
4*2+3=11
11*2+3=25
25*2+3=53 ------------ 46 which is an wrong series.
53*2+3=109
109*2+3=221
221*2+3=445
You might can understand this.
11*2+3=25
25*2+3=53 ------------ 46 which is an wrong series.
53*2+3=109
109*2+3=221
221*2+3=445
You might can understand this.
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