Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 2 (Q.No. 10)
Directions to Solve
Look carefully for the pattern, and then choose which pair of numbers comes next.
10.
75 65 85 55 45 85 35
Answer: Option
Explanation:
This is a simple subtraction series in which a random number, 85, is interpolated as every third number. In the subtraction series, 10 is subtracted from each number to arrive at the next.
Discussion:
13 comments Page 1 of 2.
PRB said:
8 years ago
Divide the numbers by common factor 5 ( later you can multiply the answer with 5).
So the series becomes- 15,13,17,11,9,17,7_, _.
Now 17( i.e 17 x 5=85 actually) is repeating as 3rd number.
Now consider (15,13).
(11,9) so the difference between first number and second is 2.
So 7, (7-2=5), 17 is the series. Now multiply each by 5 gives 35, 25 ,85.
So the series becomes- 15,13,17,11,9,17,7_, _.
Now 17( i.e 17 x 5=85 actually) is repeating as 3rd number.
Now consider (15,13).
(11,9) so the difference between first number and second is 2.
So 7, (7-2=5), 17 is the series. Now multiply each by 5 gives 35, 25 ,85.
Rajib Das said:
1 decade ago
75, 65, 85, 55, 45, 85, 35, ....., What numbers should be next?
Ans:
a1 b1 c1 a2 b2 c2 a3 b3 C=fixed
75 65 85 55 45 85 35 (?) (?)
a1-a2=75-55=20 b1-b2=65-45=20 c1-c2=85-85=00
a2-a3=55-35=20 So,b2-b3=20=45-25* So, c2-c3=00=85-85*
Ans:
a1 b1 c1 a2 b2 c2 a3 b3 C=fixed
75 65 85 55 45 85 35 (?) (?)
a1-a2=75-55=20 b1-b2=65-45=20 c1-c2=85-85=00
a2-a3=55-35=20 So,b2-b3=20=45-25* So, c2-c3=00=85-85*
Parul said:
1 decade ago
75,65,85,55,45,85,35,..
See:
75-65=10 and after this 85.
55-45=10 and after this 85.
Therefore,35-25=10.
Hence answer is (35 25 85).
After two no. with difference of 10 there is 85.
See:
75-65=10 and after this 85.
55-45=10 and after this 85.
Therefore,35-25=10.
Hence answer is (35 25 85).
After two no. with difference of 10 there is 85.
Bash.. said:
1 decade ago
Select 75, 65, 85.
55, 45, 85.
Know select 75-55=20.
65-45=20.
So we get 20.
Then.
Sub 20 from 55-20=35.
45-20=25.
Here 85 is common.
Answer is 35, 25, 85.
55, 45, 85.
Know select 75-55=20.
65-45=20.
So we get 20.
Then.
Sub 20 from 55-20=35.
45-20=25.
Here 85 is common.
Answer is 35, 25, 85.
(1)
Aditya vamsi said:
9 years ago
10is subtracted from every consequent number and 85 takes the third place.
Then, we get the answer 25 85.
Then, we get the answer 25 85.
Vijay said:
8 years ago
75 65 85 55 45 85 35.
75-65=10,
55-45=10 And here 85 is common after 2 numbers,
35-25=10
Ans:25 85.
75-65=10,
55-45=10 And here 85 is common after 2 numbers,
35-25=10
Ans:25 85.
(11)
Richa said:
1 decade ago
75-10=65
65-10=55
55-10=45
45-10=35
35-10=25
So answer 25 85.
65-10=55
55-10=45
45-10=35
35-10=25
So answer 25 85.
(2)
Sowmya said:
7 years ago
The series goes like -10, +20, -30, -10, +40, -50, -10, +60.
(5)
Muskan said:
9 years ago
Can't understand, Can you please explain briefly?
Rajib Das said:
1 decade ago
c3 is not fixed. it is an error. b3=? and c3=?
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