epub |eng | 2017-08-02 | Author:Jerome S. Meyer

All even powers of i are either −1 or +1 and whenever you see i2 you can be sure that it is –1, while i4 is +1 and so on. ...
( Category: Sudoku August 3,2019 )
mobi, epub |eng | 0100-12-31 | Author:Parnell Hall

“Good,” Harper said. “If this is what the crossword means, what have we got?” “We’ve got numbers. And not very interesting ones at that. Don’t you wish someone would invent ...
( Category: Sudoku May 7,2014 )