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Ex 3.1, 2
Last updated at May 7, 2026 by Teachoo
Class 9
Chapter 3 Class 9 - The World of Numbers (Ganita Manjari I)
- The Human Need to Count
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Exercise Set 3.1
- The Revolution of Śhūnya
- Integers
- Exercise Set 3.2
Transcript
Ex 3.1, 2 Look at the sequence of numbers on one column of the Ishango bone: 11, 13, 17, 19. What do these numbers have in common? List the next three numbers that fit this pattern. The Ishango bone has numbers 11, 13, 17, 19 All these are prime numbers Note: Prime numbers are those numbers which have only two factors – 1 and the number themselves. Eg: 2, 3, 5, 7, 11, 13, … Hence, next 3 numbers would be the next 3 prime numbers Thus, Next 3 numbers in the pattern = 23, 29, 31
