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Crocodile Paradox

A crocodile steals a child. When the mother complains, the crocodile makes the following proposal: "I will return the child if you guess if I will return it or not." The mother replies, "You will not return my child." What should the crocodile do? If he returns the child, it goes into contradiction because the mother made a mistake.
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What is the profitability of Treasury Direct?

Tesouro Direto is a National Treasury Program developed in partnership with Brazil's official stock exchange (B3) to sell federal public securities to individuals 100% online. It is the least risky type of investment in the economy, as government bonds are 100% guaranteed by the National Treasury.
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Mega-Seine Odds

Check out the odds you have of winning at Mega-Sena according to the amount of numbers played. Numbers played Probability of Hit (1 in…) Sena Quina Quadra 6 50,063,860 154,518 2,332 7 7,151,980 44,981 1,038 8 1,787,995 17,192 539 9 595,998 7,791 312 10 238,399 3,973 195 11 108.
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Challenge Response 164

Curious Words Each turns into a different word when read backwards. These words are called recurrent palindromes. Back to statement Challenge 163 The cat, coffee and cake Challenge table of contents Next >> Challenge 165 Renatinha's chocolates
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Challenge Response 178

Letters and Envelopes Considering letters a, b, and c, and the corresponding envelopes A, B, and C, we have the table below, which shows all shipping possibilities. Note that there are 6 different possibilities. However, only one has the three letters on the corresponding envelopes.
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