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Help me with this problem....
A, B, C, and D represent different digits. AACA, ADDD, BCDB, and BDAC represent four different four-digit prime numbers. Determine the sum of all four four-digit prime numbers (AACA + ADDD + BCDB + BDAC).
Yes.. thanks for the reply and i have one more doubt..
Let X be the super set.. and M be the collection of subsets of X .. then A belongs to M.. but the complement of A does not belongs to X.. Can any one give me an example for this type?
Let X be the super set..
and A be the subset of X.. the complement of A is not in X.. Is there any possibility to have sets like this?
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Good question.
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