Question

1
2 3
4 5 6
7 8 9 10
a) write the next two lines of pattern?
b)how many numbers are there in the 9th line ?
c) what is the last number in the 10th line?
d) what is the sum of the numbers in the 10th line?​

please answer me with explanation
I meant steps

Answer 1

Answer:

a)11 12 13 14 15

16 17 18 19 20 21

b)9 numbers

c)55

d)505

Answer 2

Answer:

Step-by-step explanation:

a) 11 12 13 14 15

a.ii 16 17 18 19 20 21

b. 39 40 41 42 43 44 45 46 47

c. 48 49 50 51 52 53 54 55 56 57 , 57 is the last number

d. 525