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 3 of 4.
Abhishek said:
7 years ago
21+4=25.
25-7=18.
18+11(7+11)=29.
29+4=33.
33-15=18.
18+19(15+4)=37.
37+4=41.
25-7=18.
18+11(7+11)=29.
29+4=33.
33-15=18.
18+19(15+4)=37.
37+4=41.
Pranita said:
7 years ago
21+8=29,
25+8=33,
18,
29+8=37,
33+8=41,
18.
Add 8 to each number except 18.
25+8=33,
18,
29+8=37,
33+8=41,
18.
Add 8 to each number except 18.
Navin said:
7 years ago
How 37, 41 came? According to me, the answer is 37, 18.
Anirban roy chowdhury said:
6 years ago
37,41 is the right.
Because 21+8, 25+8, 18.
29+8, 33+8, 18.
37 41, 18.
So, the answer is 37, 41, 18.
Because 21+8, 25+8, 18.
29+8, 33+8, 18.
37 41, 18.
So, the answer is 37, 41, 18.
Amit Kumar said:
6 years ago
21, 25,18,29,33,18.
25 - 21 = 4.
keep 18 as that is;
33 - 29 = 4.
again keep 18 as that is;
now , let the next number is X.
then X - 33 = 4.
so , X = 37.
And next term will be X + 4 = 37 + 4 = 41.
18 is repeating after 2 step . so next term will be 18.
Series = 21 , 25 , 18 ,29 ,33, 18 , 37 ,41 , 18.
25 - 21 = 4.
keep 18 as that is;
33 - 29 = 4.
again keep 18 as that is;
now , let the next number is X.
then X - 33 = 4.
so , X = 37.
And next term will be X + 4 = 37 + 4 = 41.
18 is repeating after 2 step . so next term will be 18.
Series = 21 , 25 , 18 ,29 ,33, 18 , 37 ,41 , 18.
Ravi said:
5 years ago
Thank you for explaining @Amit.
Amit singh Rajput said:
5 years ago
Here, 21,25,18,29,33,18.
.
18 is interpolated as every third number,so the changed numbers should be after 18
21+4 = 25.
25+4 = 29.
29+4 = 33.
33+4 = 37.
37+4 = 41.
Therefore, the answer is 37 41.
Alternative
21,25,18,29,33,18,37,41,18 after 41 again 18 will come.
so according to series 37,41 is correct answer.
.
18 is interpolated as every third number,so the changed numbers should be after 18
21+4 = 25.
25+4 = 29.
29+4 = 33.
33+4 = 37.
37+4 = 41.
Therefore, the answer is 37 41.
Alternative
21,25,18,29,33,18,37,41,18 after 41 again 18 will come.
so according to series 37,41 is correct answer.
(1)
Chandu said:
4 years ago
21 + 4 = 25
25 + 4 = 29 then ( "" 18 is interpolated of 3rd nm)
33 + 4 = 37
37 + 4 = 41.
You will get 37,41 is the answer.
Leave 18, it is the common thing.
25 + 4 = 29 then ( "" 18 is interpolated of 3rd nm)
33 + 4 = 37
37 + 4 = 41.
You will get 37,41 is the answer.
Leave 18, it is the common thing.
(3)
Suman said:
4 years ago
In this case, 18 is repeated on the third place. So, 33+4=37, then 37+4=41 then it should be 18.
(6)
Mohammad Nizam Pathan said:
2 years ago
I think option C is the correct answer.
(5)
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