Verbal Reasoning - Series Completion - Discussion
Discussion Forum : Series Completion - Section 1 (Q.No. 7)
Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
7.
1, 2, 3, 6, 9, 18, ?, 54
Answer: Option
Explanation:
The pattern is x 2, x 3/2, x 2, x 3/2, x 2,.....
So, missing term = 18 x 3/2 = 27.
Discussion:
20 comments Page 2 of 2.
Palash Mondal said:
1 decade ago
1+1 = 2
2+1 = 3
3+3 = 6
6+3 = 9
9+9 = 18
18+9 = 27
27+27 = 54
54+27 = 81...So, the answer is 27 as the addition is repeated with three to the power zero, one, two, three.
2+1 = 3
3+3 = 6
6+3 = 9
9+9 = 18
18+9 = 27
27+27 = 54
54+27 = 81...So, the answer is 27 as the addition is repeated with three to the power zero, one, two, three.
Jameharun said:
1 decade ago
2*3 = 6
3*3 = 9
6*3 = 18
9*3 = 27
18*3 = 54
3*3 = 9
6*3 = 18
9*3 = 27
18*3 = 54
(1)
Niraj singh said:
1 decade ago
First add up to three digits 1+2 = 3, 1+2+3 = 6, 6+3 = 9, then multiply, 9*2 = 18, 9*3 = 27, 9*6 = 54. So answer 27.
Madhu said:
1 decade ago
@Sumit.
That is possible in 2, 2 sets only, like 1, 2; 3, 6; 9, 18; 27, 54; so the answer must be 27 only.
That is possible in 2, 2 sets only, like 1, 2; 3, 6; 9, 18; 27, 54; so the answer must be 27 only.
Suganya said:
1 decade ago
2-1=1
3-2=1
6-3=3
9-6=3
18-9=9
27-18=9
so the ans is 27
3-2=1
6-3=3
9-6=3
18-9=9
27-18=9
so the ans is 27
Eva said:
1 decade ago
1+2=3
1+2+3=6
6+3=9
6+3+9=18
18+9=27
18+9+27=54
1+2+3=6
6+3=9
6+3+9=18
18+9=27
18+9+27=54
Sumit said:
1 decade ago
Her we can see that every 2nd digit is the double of its preceding digit......so 1+1 2, 3+3 6, 9+9 18, 18+18 36,and so on.......so ans is 36
Gaurav said:
1 decade ago
Also.
All the odd terms are multiplied by 3.
1, _, 3, _, 9, _, 27.
All the odd terms are multiplied by 3.
1, _, 3, _, 9, _, 27.
Rajesh said:
1 decade ago
1+2=3
2*3=6
3+6=9
2*9=18
18+9=27
2*27=54
first add two numbers and and multiply 3rd num with 2
2*3=6
3+6=9
2*9=18
18+9=27
2*27=54
first add two numbers and and multiply 3rd num with 2
Mahesh said:
1 decade ago
Also
Add 1, 1, 3, 3, 9, 9, 27.
Add 1, 1, 3, 3, 9, 9, 27.
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