5 articles trouvés pour ce sujet.
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Three consecutive natural numbers |
2017-06-11 |
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Anita pose la question :
Three consecutive natural numbers are such that the square of the middle number exceeds the difference of the square of the other two by 60. Find the numbers.
Penny Nom lui répond. |
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1/a + 1/b + 1/c < 1 |
2010-02-01 |
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Mrityun pose la question :
suppose a,b and c are natural numbers such that 1/a + 1/b + 1/c < 1. Prove that
1/a + 1/b + 1/c < = 41/42.
Penny Nom and Claude Tardif lui répond. |
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39 consecutive natural numbers |
2003-08-19 |
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A student pose la question :
Prove that among any 39 consecutive natural numbers it is always possible to find one whose sum of digits is divisible by 11.
Penny Nom lui répond. |
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Subsets of the natural numbers |
2001-01-30 |
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Christina pose la question :
How do I explain why the set of natural numbers (N) cannot be equivalent to one of its finite subsets?
Penny Nom lui répond. |
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Natural numbers |
2000-04-12 |
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Sara pose la question :
What is a natural number???
Penny Nom lui répond. |
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