Answer:
23
Step-by-step explanation:
The given series of numbers is 5 10 3 15 20 13 25 30 _
Segregating the numbers in sets of 3 we have:
5 10 3
15 20 13
25 30 _
The difference between 2 corresponding terms in adjacent sets is 10.
For example: taking the first terms from each set,it is 5, 15 , 25
Similarly taking the second term from each set, it is 10,20,30
Hence, taking the third term: 3, 13, 23.
So the missing term in the sequence is 23.
