Aptitude - Odd Man Out and Series - Discussion
Discussion Forum : Odd Man Out and Series - Missing No. (Q.No. 10)
Directions to Solve
Insert the missing number.
10.
7, 26, 63, 124, 215, 342, (....)
Answer: Option
Explanation:
Numbers are (23 - 1), (33 - 1), (43 - 1), (53 - 1), (63 - 1), (73 - 1) etc.
So, the next number is (83 - 1) = (512 - 1) = 511.
Discussion:
10 comments Page 1 of 1.
Asinei Uganda said:
2 years ago
Thanks for you answer @Jagadeesh.
Ankitchoudhary said:
4 years ago
Agree, Thanks @Jagadeesh Garimella.
Himani Prajapati said:
5 years ago
U can also solve by this way.
7+0=7.
2+6=8,
6+3=9,
And it will repeat again so after 342=3+4+2= 9.
Then 511 will be next number bcoz sum of digits is 5+1+1 =7.
7+0=7.
2+6=8,
6+3=9,
And it will repeat again so after 342=3+4+2= 9.
Then 511 will be next number bcoz sum of digits is 5+1+1 =7.
(1)
Hritik said:
5 years ago
@Jyoti Yadav.
Cube of 0+1=1.
Cube of 1+1=2.
Cube of 2+1=9.
But there is no any cube for 37.
Cube of 4+1=65,
Cube of 5+1=126.
Cube of 6+1=217.
That's why 37 is odd in this group.
Cube of 0+1=1.
Cube of 1+1=2.
Cube of 2+1=9.
But there is no any cube for 37.
Cube of 4+1=65,
Cube of 5+1=126.
Cube of 6+1=217.
That's why 37 is odd in this group.
Jyoti yadav said:
6 years ago
1 2 9 37 65 126 217 ?
Please solve the given series with the correct explanation.
Please solve the given series with the correct explanation.
Jagadeesh Garimella said:
8 years ago
There is one more way but lengthy:
26 - 7 = 19,
63 - 26 = 37,
124 - 63 = 61,
215 - 124 = 91,
342 - 215 = 127:.
If we take the remainders and subtract,
37 - 19 = 18,
61 - 37 = 24,
91 - 61 = 30
127 - 91 = 36 which are multiples of 6, hence the last number should have the difference of 42.
Hence 127 + 42 =169. This should be added to 342 to get the answer.
26 - 7 = 19,
63 - 26 = 37,
124 - 63 = 61,
215 - 124 = 91,
342 - 215 = 127:.
If we take the remainders and subtract,
37 - 19 = 18,
61 - 37 = 24,
91 - 61 = 30
127 - 91 = 36 which are multiples of 6, hence the last number should have the difference of 42.
Hence 127 + 42 =169. This should be added to 342 to get the answer.
(2)
Princess said:
10 years ago
@Bhupinder Singh.
Your logic is not working here as the sum of digits of option D (421) is 4+2+1=7, than how we can say the answer is B?
Your logic is not working here as the sum of digits of option D (421) is 4+2+1=7, than how we can say the answer is B?
Ffd said:
1 decade ago
I too in same way and that is also the possible way.
Venki said:
1 decade ago
No. Because here only one answer has taken. Logic is ok. But apply every time.
Bhupinder Singh said:
1 decade ago
I have soved it in a different way like:
7, 2+6=8, 6+3=9, 1+2+4=7, 2+1+5=8, 3+4+2=9, (4+2+1=7 or 5+1+1=7)
so the series is 7,8,9,7,8,9,7 ....
Please reply me can we apply this logic here or not
7, 2+6=8, 6+3=9, 1+2+4=7, 2+1+5=8, 3+4+2=9, (4+2+1=7 or 5+1+1=7)
so the series is 7,8,9,7,8,9,7 ....
Please reply me can we apply this logic here or not
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers