Question

1
2 3
4 5 6
7 8 9 10
........................
................................
a write the next two line
of this pattern
6. How many numbers are there in the 9th line?
c. what i the last number in the 10th line?
do what as the sum of the number in the 10th line ?​

Answer 1

Answer:

1) 11 12 13 14 15

16 17 18 19 20 21

2) 9no.

3) 55

4) 505

Answer 2

Answer:

11,12,13,14,15

16,17,18,19,20,21

Step-by-step explanation:

1

2,3

4,5,6

7,8,9,10

11,12,13,14,15

16,17,18,19,20,21