Question

If 13 = 6,
14 = 10 and
15 = 15,
then 19 = ?​

Answer 1

Answer:

45

Step-by-step explanation:

13=6

14=10

14-13=10-6=4

15=15

15-14=15-10=5

hence for next series

16---15+6=21

17---15+6+7=28

18---15+6+7+8=36

19---15+6+7+8+9=45

Answer 2

Answer=

13=6

14=10

15=15

16=21

17=28

18=36

19=45