5 items are filed under this topic.
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Three consecutive natural numbers |
2017-06-11 |
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From Anita:
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.
Answered by Penny Nom. |
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1/a + 1/b + 1/c < 1 |
2010-02-01 |
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From Mrityun:
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.
Answered by Penny Nom and Claude Tardif. |
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39 consecutive natural numbers |
2003-08-19 |
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From A student:
Prove that among any 39 consecutive natural numbers it is always possible to find one whose sum of digits is divisible by 11.
Answered by Penny Nom. |
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Subsets of the natural numbers |
2001-01-30 |
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From Christina:
How do I explain why the set of natural numbers (N) cannot be equivalent to one of its finite subsets?
Answered by Penny Nom. |
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Natural numbers |
2000-04-12 |
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From Sara:
What is a natural number???
Answered by Penny Nom. |
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