1. restul este 1 (157:12=13 rest 1)
2.D14={1,2,7,14} (iti alegi)
3.81( [tex] 9^{2} [/tex] )
4.15 (75:5=15)
5.500( [tex] 10^{3} - 10*50 =1000-500=500[/tex] )
6. [tex] 13^{23} [/tex]
7. 10(a*b+a*c=a(b+c)=2*5=10)
8. 19(Ma=(14+24):2=38:2=19 )
PARTEA A DOUA
1. 4 (a=1;b=2)
2. x=1 (7x-3<11 7x<14; x<2)
3. 4 (a+b=21; a:b=4 rest1; a=4b+1; 4b+1+b=21; 5b+1=21; 5b=21-1=20; b=20:5=4)
4. 888 ( abc+bca+cab=100a+10b+c+100b+10c+a+100c+10a+b=111a+111b+111c=111(a+b+c=111*8=888)
