**S Chand ICSE Mathematics Class 6 Solution Second Chapter Natural Numbers and Whole Numbers Exercise 2F (O.P. Malhotra, S.K. Gupta, Anubhuti Gangal)**

**EXERCISE 2F**

**(1) Which of the following numbers are triangular numbers ? **

- A) 3, 6, 10, 27, 36
- B) 2
- C) 6 and 8

**(2) ****Write the next two steps of each of the given patterns. Can you say how the pattern works?**

(i) 1 × 8 = 8

12 × 8 = 88 + 8

123 × 8 = 888 + 88 + 8

1234 × 8 = 8888 + 888 + 88 + 8

12345 × = 88888 + 8888 + 888 + 88 + 8

123456 × 8 = 888888 + 88888 + 8888 + 888 + 88 + 8

(ii) 7 × 11 = 77

63 × 101 = 6363

234 × 1001 = 234234

4189 × 10001 = 41894189

2138 × 100001 = 21382138

758321 × 1000001 = 758321758321

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