|
2 articles trouvés pour ce sujet.
 |
|
|
|
|
|
|
|
|
A 3 digit number |
2008-01-23 |
|
Adrian pose la question :
Consider a 3-digit number,abc,where a is not equal to c.Switch it so that it becomes cba.Subtract
the lesser from the greater to obtain rst.Switch this so that it is tsr.Prove that rst+tsr=1089
Stephen La Rocque lui répond. |
|
|
|
|
|
|
Write the digits 1 to 9 on index cards, ... |
2006-10-19 |
|
Kim pose la question :
Write the digits 1 to 9 on index cards, arrange the cards to form three 3-digit numbers (using each card only ONCE). The third number is the sum of the first two numbers ** how many different ways can you do this?? **
Penny Nom lui répond. |
|
|
|
