Logical Reasoning - Number Series - Discussion
Discussion Forum : Number Series - Type 4 (Q.No. 12)
Directions to Solve
Find the number that fits somewhere into the middle of the series. Some of the items involve both numbers and letters
12.
Look at this series: 4, 7, 25, 10, __, 20, 16, 19, ... What number should fill the blank?
Answer: Option
Explanation:
Two series alternate here, with every third number following a different pattern. In the main series, 3 is added to each number to arrive at the next. In the alternating series, 5 is subtracted from each number to arrive at the next.
Discussion:
27 comments Page 3 of 3.
Aayan sharma said:
1 decade ago
Here in the 1st set we see that (4, 7, 25) and in the second set we see that (10, -, 20).
In the first we see that 4 + 3 is 7 and 25 - 5 we get 20. So 10 should be added with 3 to get answer 13.
In the first we see that 4 + 3 is 7 and 25 - 5 we get 20. So 10 should be added with 3 to get answer 13.
Sanjeev said:
8 years ago
What is the next number of 4, 3, 4, 7, 15?
Solve it.
Solve it.
Ramkumar said:
1 decade ago
Hai @Wally.
Here: 4, 7, 25, 10, __, 20, 16, 19, ... ( TWO set of series).
Then,
Split series: (4, 7, 10, _, 16, 19, ........) +3 series.
(25, 20, 15,........) -5 series.
So the answer is 10+3 =13.
Here: 4, 7, 25, 10, __, 20, 16, 19, ... ( TWO set of series).
Then,
Split series: (4, 7, 10, _, 16, 19, ........) +3 series.
(25, 20, 15,........) -5 series.
So the answer is 10+3 =13.
Varun said:
1 decade ago
Thanks kaushik, it's really help me!
Banu Sivaguru said:
1 decade ago
Let us spilit the series innto two (a,b)... (a1,a2,b1)(a3,a4,b2) (a5,a6,b3) and so on..... if we see A series are increasing gradually with number 3like(4,7,10,...16,19) and b is the second set of series increase with 5(20,25) .....
So here we have to find out the missing number of a4(10+3=13)......
Hope you guys understood....
So here we have to find out the missing number of a4(10+3=13)......
Hope you guys understood....
Neethu said:
1 decade ago
Here there are two series of which first series consists of 4,7,10,...,16,19.here if we observe every number is incrementing with three. so the answer is 13(10+3) and the second series is 25 and 20.
Wally said:
1 decade ago
Please anyone tell how can we do for (10, _, 20). Please reply.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers