Class 6 | Mathematics | Chapter 3| Playing with Numbers | Exercise 3.1 Question 1:Write all the factors of the following numbers: (a) 24 (b) 15 (c) 21 (d) 27 (e) 12 (f) 20 (g) 18 (h) 23 (i) 36 Answer 1: (a) 24 = 1 x 24 = 2 x 12 = 3 x 8 = 4 x 6 = 6 x 4 Factors of 24 = 1, 2, 3, 4, 6, 12, 24 (b) 15 = 1 x 15 = 3 x 5 = 5 x 3 Factors of 15 = 1, 3, 5, 15 (c) 21 = 1 x 21 … [Read more...] about Exercise 3.1
Chapter 3
Chapter 3 Atoms and Molcules
Class 9 | Science | Chapter 3 |Atoms and Molecules| NCERT Solutions Page 32, 33 1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of acetic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium acetate. Show that these observations are in agreement with the law of conservation of mass. sodium carbonate + acetic acid → sodium acetate + … [Read more...] about Chapter 3 Atoms and Molcules
Chapter 3 Synthetic Fibres and Plastics
Class 8 | Science | Ch 3 | Synthetic Fibres and Plastics | NCERT Solutions 1. Explain why some fibres are called synthetic. Answer: Those fibres which are prepared by man using chemicals are called synthetic fibres. They are formed by combination of large number of small molecules joined together. For ex: Rayon, nylon, polyester, acrylic etc. 2. Mark (√ ) the … [Read more...] about Chapter 3 Synthetic Fibres and Plastics