Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 9)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
9.
21 25 18 29 33 18
Answer: Option
Explanation:
This is a simple addition series with a random number, 18, interpolated as every third number. In the series, 4 is added to each number except 18, to arrive at the next number.
Discussion:
34 comments Page 1 of 4.
Devraj said:
1 decade ago
I don't get the explanation.
Namratha nayak said:
1 decade ago
In the above series 18 is interpolated as 3rd number. ie., after 21 25 and 29 33.
4 is added to each number to get teh next number. Ie., 21+4=25 (21 25)
25+4=29
29+4=33 (29 33)
Add 4 to 33
33+4=37
37+4=41 (37 41)
I hope this is clear!
4 is added to each number to get teh next number. Ie., 21+4=25 (21 25)
25+4=29
29+4=33 (29 33)
Add 4 to 33
33+4=37
37+4=41 (37 41)
I hope this is clear!
Vijay said:
1 decade ago
21+4=25---25,18
25+4=29---29,18
29+4=33---33,18
33+4=37---37,18
So the answer is 37,18 that's it
25+4=29---29,18
29+4=33---33,18
33+4=37---37,18
So the answer is 37,18 that's it
HEMA URS said:
1 decade ago
21+4=25 (21,25)
SKIP 18
25+4=29 (25,18,29)
29+4=33 (29,33)
SKIP 18
33+4=37 (33,18,37)
37+4=41 (37,41)
SKIP 18
41+4=45 (41,18,45)
45+4=49 (45,49)
SKIP 18 N SO ON
SO THE FINAL SERIES WILL BE 21,25,18,29,33,18,37,41,18........
SO THE ANSWER IS 37,41
SKIP 18
25+4=29 (25,18,29)
29+4=33 (29,33)
SKIP 18
33+4=37 (33,18,37)
37+4=41 (37,41)
SKIP 18
41+4=45 (41,18,45)
45+4=49 (45,49)
SKIP 18 N SO ON
SO THE FINAL SERIES WILL BE 21,25,18,29,33,18,37,41,18........
SO THE ANSWER IS 37,41
Prasanthi said:
1 decade ago
Thank you Namratha and Hema for the explanations.
Sarmistha said:
1 decade ago
21+18=39 39-10=29
25+18=43 43-10=33
18 is interpolated as every third number,so the changed numbers should be after 18
the series 21 25 18 29 33 18
now, 29+18=47 47-10=37
33+18=51 51-10=41 so the next numbers -- 37 41
series -- 21 25 18 29 33 18 37 41
25+18=43 43-10=33
18 is interpolated as every third number,so the changed numbers should be after 18
the series 21 25 18 29 33 18
now, 29+18=47 47-10=37
33+18=51 51-10=41 so the next numbers -- 37 41
series -- 21 25 18 29 33 18 37 41
Mahendra said:
1 decade ago
Vijay sir 18 is on the third place in series that's why answer is 37, 41. Please mind it.
Sunny said:
1 decade ago
21 25 18 29 33 18..
In this series we see that 18 is repeated.
So keep 18 aside for some time.
So the series will be - 21, 25, 29, 33.
Now if you look closely the sequence progresses by 4 so in other words it is - 21+4 = 25, 25+4 = 29, 29+4 = 33.
So the next two numbers are 33+4 = 37 and 37+4 = 41.
(IMPORTANT: If in case they wanted the third number then it would have been 18 and not 45 as 18 is repeated after every 2 numbers.)
In this series we see that 18 is repeated.
So keep 18 aside for some time.
So the series will be - 21, 25, 29, 33.
Now if you look closely the sequence progresses by 4 so in other words it is - 21+4 = 25, 25+4 = 29, 29+4 = 33.
So the next two numbers are 33+4 = 37 and 37+4 = 41.
(IMPORTANT: If in case they wanted the third number then it would have been 18 and not 45 as 18 is repeated after every 2 numbers.)
Dhiraj Bansal said:
1 decade ago
21 25 18 29 33 18...
In this series we see that 18 is repeated.
So keep 18 aside for some time.
So now series is : 21 25 29 33...
As we are observing difference of 4.
So now the next number is 37.
21 25 18 29 33 18 37 41 18...
So the correct answer is D: 37 41.
In this series we see that 18 is repeated.
So keep 18 aside for some time.
So now series is : 21 25 29 33...
As we are observing difference of 4.
So now the next number is 37.
21 25 18 29 33 18 37 41 18...
So the correct answer is D: 37 41.
Sravani mantripragada said:
10 years ago
It is shown that 18 is at 3rd position in series 37, 18 (wrong because there 18 is not in the 3rd position) hence 37+4 = 41.
Hope understand!
Hope understand!
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