Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 1)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
1.
28 25 5 21 18 5 14
Answer: Option
Explanation:
This is an alternating subtraction series with the interpolation of a random number, 5, as every third number. In the subtraction series, 3 is subtracted, then 4, then 3, and so on.
Discussion:
128 comments Page 8 of 13.
RAGHURAM .M PGDM 1 said:
9 years ago
Take difference of 3 for the preceeding number, placing 5 alternatively.
Lipi said:
9 years ago
28 - (25) =3 5 =25 5.
21 - (18) =3 5 =18 5.
14 - (?) =3 5 = ? 5.
= 14 - (11) = 3 5 = 11 5 (ans).
21 - (18) =3 5 =18 5.
14 - (?) =3 5 = ? 5.
= 14 - (11) = 3 5 = 11 5 (ans).
Surya said:
9 years ago
Thanks @Rohit.
Gowthami said:
9 years ago
28 - 3 = 25 & 5.
21 - 3 = 18 & 5.
14 - 3 = 11 & 5.
21 - 3 = 18 & 5.
14 - 3 = 11 & 5.
Jyotsana said:
10 years ago
I get the nice explanations. Thank you all.
Trilok Tak said:
10 years ago
28 25 5 21 18 5 14 ? ?
28 (-3) = 25 (Repeat)5.
21 (-3) = 18 (Repeat)5.
14 (-3) =11 (Repeat)5.
So,
28 25 5 21 18 5 14 11 5.
28 (-3) = 25 (Repeat)5.
21 (-3) = 18 (Repeat)5.
14 (-3) =11 (Repeat)5.
So,
28 25 5 21 18 5 14 11 5.
Surinder Singh said:
10 years ago
25 - 18 = 7.
21 - 14 = 7.
18 - 7 = 11.
Then 5 is repeated for every 3rd number.
21 - 14 = 7.
18 - 7 = 11.
Then 5 is repeated for every 3rd number.
Vinay juwantha said:
10 years ago
Easy to solve the series. Thank you all.
PALLAVI KRISHNA GOLLAPINNI said:
10 years ago
28 - 3 = 25 & 5
25 - 4 = 21 & 5
21 - 3 = 18 & 5
18 - 4 = 14 & 5
14 - 3 = 11 & 5
It is a simple logic.
25 - 4 = 21 & 5
21 - 3 = 18 & 5
18 - 4 = 14 & 5
14 - 3 = 11 & 5
It is a simple logic.
Vanaja said:
10 years ago
Nice explanation.
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