



 
There are 1000 codes starting with 4; one possibility is to try all of them (a couple hours' work if this does not set off an antihacker lockdown.) Apart from that, she can only try to think what sort of code she might have used. A visual thinker might pick one like 4268 that makes a visual pattern on the keyboard; a spatial thinker might pick one like 4586 that has a tactile pattern. A math student might pick 4964 (two consecutive squares). Some people might pick a street number, the last four digits of a familiar phone number, or a fourletter word or name using the letters on a dial (GAIL = 4245) Good Hunting!  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 