Math Contest - November 2003


We purpose you the following problems: (English)

1. Using the digits 1, 5, 6, 7 only once, and at least one pair of brackets and any combination of +, -, *, :, obtain the number 21.
2. Obtain the number 123456789 using all it's digits, brackets, +, -, *, : and ^.
Example:
126 = 21 * 6;

You can email your answers to coldfire@ploiesti.roedu.net.
Solutions should be send until 21st November.

Good luck!
Va propunem urmatoarele probleme: (Romanian)

1. Folosind cifrele 1,5,6,7 o singura data, cel putin o pereche de paranteze si orice combinatie de +, -, *, :, sa se obtina 21.
2. Obtineti numarul 123456789 folosind toate cifrele sale, paranteze, semnele +, -, *, :, si ridicarea la putere.
Exemplu:
126 = 21*6;

Puteti sa trimiteti raspunsurile la mailto:coldfire@ploiesti.roedu.net?Subject=Math Problems.

Succes!