happy maths - numbers - mala kumar (1.4 mb pdf) - Arvind Gupta
happy maths - numbers - mala kumar (1.4 mb pdf) - Arvind Gupta
happy maths - numbers - mala kumar (1.4 mb pdf) - Arvind Gupta
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1. According to the story, how many fish went back into the<br />
river yesterday?<br />
2. Did he throw back more or less nu<strong>mb</strong>er of fish today? How<br />
many fish went into the basket today?<br />
3. Tomorrow, Grandpa has to really think hard before throwing<br />
back the fish. There is something special about the<br />
<strong>nu<strong>mb</strong>ers</strong> 2, 3, 5, 7, …. Can you guess what?<br />
4.<br />
How many fishes did Grandpa catch today?<br />
5. A prime nu<strong>mb</strong>er is a nu<strong>mb</strong>er that can be divided exactly<br />
by two <strong>nu<strong>mb</strong>ers</strong>,1 and by itself.<br />
1 can be divided ONLY by 1. So 1 is not a prime nu<strong>mb</strong>er.<br />
13 can be divided by 1. It can be divided by 13. So it is a<br />
prime nu<strong>mb</strong>er. 15 can be divided by 1, 3, 5, and 15. So it is<br />
not a prime nu<strong>mb</strong>er. Can you count the nu<strong>mb</strong>er of prime<br />
<strong>nu<strong>mb</strong>ers</strong> between 1 and 50?<br />
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