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