Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 7)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
7.
17 17 34 20 20 31 23
Answer: Option
Explanation:
This is an alternating subtraction series with repetition. There are two different patterns here. In the first, a number repeats itself; then 3 is added to that number to arrive at the next number, which also repeats. This gives the series 17, 17, 20, 20, 23, and so on. Every third number follows a second pattern, in which 3 is subtracted from each number to arrive at the next: 34, 31, 28.
Discussion:
33 comments Page 2 of 4.
SHUBHAM KUMAR said:
3 years ago
17 17 34 20 20 31 23.
17+(0+17)+(17+17).
20+(0+20)+{20+11(17-6)}.
23+(0+23)+{23+5(11-6)}.
And the order is; 17 17 34 20 20 31 23 23 28.
17+(0+17)+(17+17).
20+(0+20)+{20+11(17-6)}.
23+(0+23)+{23+5(11-6)}.
And the order is; 17 17 34 20 20 31 23 23 28.
(5)
Roopa said:
9 years ago
In simple,
(17 17) 34 (20 20 ) 31 (23 ?)
Here,
17 + 3 = 20.
20 + 3 = (23).
And 34 - 31 = 3.
31 - (28) = 3.
Ans are in brakets.
(17 17) 34 (20 20 ) 31 (23 ?)
Here,
17 + 3 = 20.
20 + 3 = (23).
And 34 - 31 = 3.
31 - (28) = 3.
Ans are in brakets.
(2)
Pranjal Deori said:
4 years ago
@All.
According to me, the solution is;
7 17(34) 20 20 (31) 23 23 (28)
(34-3=31).
(31-3 =28).
According to me, the solution is;
7 17(34) 20 20 (31) 23 23 (28)
(34-3=31).
(31-3 =28).
(32)
Aditya vamsi said:
9 years ago
For every two consequent numbers 3 is added to the next one and three is subtracted from the preceding number.
Rajanna said:
1 decade ago
First of three nos 17 17 34
second 20 20 31
Third of three 23 23 28
sol: 17 +3 17+3 34-3 so on..........
second 20 20 31
Third of three 23 23 28
sol: 17 +3 17+3 34-3 so on..........
PANERI RIYA R said:
10 years ago
17 17, 17, 20, 20 differences between 3 20+3 = 23.
2 34, 31 difference between 31-3 = 28 answer 23 28.
2 34, 31 difference between 31-3 = 28 answer 23 28.
Mahesh said:
1 decade ago
17+17 = 34-0 = 34.
20+20 = 40-9 = 31.
Now verify option,
23+23 = 46-18 = 28 So answer is 23, 28.
20+20 = 40-9 = 31.
Now verify option,
23+23 = 46-18 = 28 So answer is 23, 28.
Guri Singh said:
5 months ago
17 + 3 = 20,
20 - 3 = 17,
31 + 3 = 34,
34 - 3 = 31,
23 + 3 = 26,
26 - 3 = 23.
26.23 is the answer.
20 - 3 = 17,
31 + 3 = 34,
34 - 3 = 31,
23 + 3 = 26,
26 - 3 = 23.
26.23 is the answer.
(3)
Baidhar said:
1 decade ago
17+3 = 20
17+3 = 20
34-3 = 31
20+3 = 23
20+3 = 23
31-3 = 28
Answer is 23 28.
17+3 = 20
34-3 = 31
20+3 = 23
20+3 = 23
31-3 = 28
Answer is 23 28.
Satheeshkumar said:
9 years ago
17 + 3 = 20,
17 + 3 = 20,
34 - 3 = 31,
17 + 6 = 23,
17 + 6 = 23,
34 - 6 = 28.
17 + 3 = 20,
34 - 3 = 31,
17 + 6 = 23,
17 + 6 = 23,
34 - 6 = 28.
(1)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers