Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 2)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
2.
8 11 21 15 18 21 22
Answer: Option
Explanation:
This is an alternating addition series, with a random number, 21, interpolated as every third number. The addition series alternates between adding 3 and adding 4. The number 21 appears after each number arrived at by adding 3.
Discussion:
66 comments Page 1 of 7.
Praveen Reddy said:
1 year ago
8 +7 = 15.
11 + 7 = 18.
21 common.
15 + 7 = 22.
18 + 7 = 25.
21 common.
So, the answer is 25 21.
11 + 7 = 18.
21 common.
15 + 7 = 22.
18 + 7 = 25.
21 common.
So, the answer is 25 21.
(28)
Rambharos Pandit said:
2 years ago
8 + 3 = 11 21
11 + 4 = 15 21
15 + 3 = 18 21
18 + 4 = 22 21
22 + 3 = 25 21 => answer.
11 + 4 = 15 21
15 + 3 = 18 21
18 + 4 = 22 21
22 + 3 = 25 21 => answer.
(65)
Trp said:
2 years ago
Thanks everyone for the explanation.
(8)
Milan Dheeraj said:
2 years ago
Skip 21
Add 3 and 4 gradually
8+3=11 (skip 21)
11+4=15.
15+3=18 (skip 21)
18+4=22.
22+3=25 (skip 21)
Ans : 25 21.
Add 3 and 4 gradually
8+3=11 (skip 21)
11+4=15.
15+3=18 (skip 21)
18+4=22.
22+3=25 (skip 21)
Ans : 25 21.
(28)
Chandan said:
2 years ago
The logic of the series is 8 + 3 = 11(21).
15 + 3 = 18(21).
22 + 3 = 25(21)
15 + 3 = 18(21).
22 + 3 = 25(21)
(9)
Jyoti chauhan said:
2 years ago
8 + 3 = 11 21.
11 + 4 = 15.
15 + 3 = 18 21.
18 + 4 = 22.
22 + 3 = 25 21.
11 + 4 = 15.
15 + 3 = 18 21.
18 + 4 = 22.
22 + 3 = 25 21.
(28)
Anjali said:
3 years ago
21 is common. Choose the difference b/w alternate numbers.
8 11 diff is 7
15 18
22
8-15 = 7
11-18 =7
So, 18 = 7 = 25 :22 25 is the answer.
8 11 diff is 7
15 18
22
8-15 = 7
11-18 =7
So, 18 = 7 = 25 :22 25 is the answer.
(12)
Aakriti said:
3 years ago
It's so confusing. Anyone, help me to get it.
(7)
Pooja said:
3 years ago
Great explanation. Thanks all.
(5)
Shital ingale said:
3 years ago
8 + 3 =11. _____21.
15 + 3 =18. _______21.
So.
22 + 3 = 25. __________21.
Then, Answer : 25 21.
15 + 3 =18. _______21.
So.
22 + 3 = 25. __________21.
Then, Answer : 25 21.
(34)
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