# 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 1 of 3.
Kamali said:
4 years ago

It could be cracked easily when solved from right to left.

Multiplying 2 and adding 3 to the multiplied result.

(4*2)+3 = 11.

(11*2)+3 = 25.

(25*2)+3 = 53.

(53*2)+3 = 109.

(109*2)+3 = 221.

(221*2)+3 = 445.

So, 46 is the wrong answer.

Multiplying 2 and adding 3 to the multiplied result.

(4*2)+3 = 11.

(11*2)+3 = 25.

(25*2)+3 = 53.

(53*2)+3 = 109.

(109*2)+3 = 221.

(221*2)+3 = 445.

So, 46 is the wrong answer.

(2)

Nagendramurthy said:
1 decade ago

Let me explain ..

445-3=442

442/2=221

221-3=218

218/2=109

109-3=106

106/2=53

53-3=50

50/2=25

25-3=22

22/2=11

11-3=8

8/2=4

So after 109 it should be 53.. in the given series it is 46 so

Have a nice day..!

445-3=442

442/2=221

221-3=218

218/2=109

109-3=106

106/2=53

53-3=50

50/2=25

25-3=22

22/2=11

11-3=8

8/2=4

So after 109 it should be 53.. in the given series it is 46 so

Have a nice day..!

Harshita said:
3 years ago

@Dhara.

Your way of solving the question is wrong because then the given series is proved wrong.

4+7=11.

11+14=25,

25+21=46,

46+28=74,

74+35=109,

109+42=251.

Hence the given solution is correct.

Your way of solving the question is wrong because then the given series is proved wrong.

4+7=11.

11+14=25,

25+21=46,

46+28=74,

74+35=109,

109+42=251.

Hence the given solution is correct.

(2)

Kamlesh said:
6 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:
7 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!

Satya said:
10 years 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?

Dhara said:
4 years ago

4.

I solved the question in this way.

4+7 = 11,

11+14 = 25,

25+21 = 46,

46+28 = 74.

So, 109 should be wrong.

I am right, Can anyone tell me?

I solved the question in this way.

4+7 = 11,

11+14 = 25,

25+21 = 46,

46+28 = 74.

So, 109 should be wrong.

I am right, Can anyone tell me?

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.

BoB said:
9 years 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.

Lakshu said:
6 years ago

We can simply do that:

445-221 = 224

224/2 = 112

221-109=112

112/2 = 56

109-46 = 63, So 46 is the wrong answer.

445-221 = 224

224/2 = 112

221-109=112

112/2 = 56

109-46 = 63, So 46 is the wrong answer.

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