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Zlatan Aleksic

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149. Nešić Olivera 33
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151. Zlatan Aleksic 32
152. Donya Sayah 31
153. Donald Bradley 31
last 3 solved tasks
Remove 5 letters from this sequence (JHOERSPKITAPL) to reveal a familiar English word.
If b9bb7 - b9cbc = ca6 find number abc. Multiple solutions may exist.
What do you call a bear without an ear?

Largest prime number

In 1997, Gordon Spence discovered the largest known prime number, 2^2976221 - 1, the 36th known Mersenne prime number. It took his 100-MHz Pentium PC fifteen days to prove it. At 895,932 digits in length, if printed out the number would stretch for 1.4 miles or if spoken 8 hours a day would take 28 days to complete.

An American, traveling on a tr...

An American, traveling on a train in Europe, met a Cuban tobacco grower, a Russian vodka distiller and a lawyer.
While they were talking business, the Cuban took out four cigars and passed them around. After lighting his own cigar, the Cuban took one drag and then threw it out the window, explaining that cigars were of no consequence in his country since there was such an abundance of them.
After dinner, the Russian passed out bottles of vodka. After taking just one swig, he threw the bottle out the window, explaining that vodka was of no consequence since, in Russia, it was so plentiful.
The American businessman sat in quiet contemplation for several minutes, then arose... and threw the lawyer out the window.
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