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How many old number are there …

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How many old number are there from 12 to 28. What fraction of them are prime numbers?

    • Posted by 78 Shanu Sharma 5 years, 1 month ago

    ICSE & ISC > Class 06 > Mathematics
    • 1 answers

    Anjali Jhaba 5 years, 1 month ago

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    1. Three friends plucked some mangoes from a mango grove and collected them together in a pile and took a nap after that. After some time, one of the friends woke up and divided the mangoes into three equal numbers. There was one mango extra. He gave it to a monkey nearby, took one part for himself and slept again. Next the second friend got up unaware of what had happened and divided the rest of the mangoes into three equal shares. There was an extra mango. He gave it to the monkey, took one share for himself and slept again. Next the third friend got up not knowing what happened and divided the mangoes into three equal shares. There was an extra mango. He gave it to the monkey, took one share for himself and went to sleep again. After Some time, all of them got up together to find 30 mangoes. How many mangoes did the friends pluck initially? 2. Ten saplings are to be planted in straight lines in such a way that each line has exactly four of them. 3. There is a number which is very peculiar. This number is three times the sum of its digits. Can you find the number?

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