Simplify :

(i) 39 - 18 ÷ 3 + 2 x 3

(ii) 8 + 2 x 5

(iii) 5 x 8 - 6 ÷ 2

(iv) 19 - 9 x 2

(v) 15 ÷ 5 x 4 ÷ 2

Study the following pattern. In each case write the next three steps :

111 ÷ 3 = 37

222 ÷ 6 = 37

333 ÷ 9 = 37

444 ÷ 12 = 37

Study the following pattern. In each case write the next three steps :

12345679 x 9 = 111111111

12345679 x 18 = 222222222

12345679 x 27 = 333333333

12345679 x 36 = 444444444

Observe the following pattern and answer the questions that follow :

1 + 2 + 3 + 4 + 5 = 15

2 + 3 + 4 + 5 + 6 = 20

3 + 4 + 5 + 6 + 7 = 25

(i) By which number should we multiply the middle number to get the sum?

(ii) Write the row of the pattern which gives the sum as 75.

(iii) Can there be any row of the pattern which gives the sum as 92?