What number is needed to complete the pattern below? 5 10 3 15 20 13 25 30

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.

55

step-by-step explanation:

it would be 6xy and -16xy.