Question

Look at the following number pattern.

1

2 3 4

5 6 7 8 9

..............................

.............................

a) Write the next line.

b) Continue like this, how many numbers in the 10th line.

c) Which is the last number in the 9th row.

d) Which is the first number in the 10throw.

e) Find the sum of all numbers in the 10throw.​

Answer 1

Answer:

number in the 10th line 19