$10\sqrt{3}-\sqrt{5}\approx 10\cdot 1,73-2,23=17,3-2,23=15,07\approx 15-H$  

$100\sqrt{5}-100\sqrt{3}=100\left(\sqrt{5}-\sqrt{3}\right)\approx 100\left(2,23-1,73\right)=100\cdot 0,5=50-E$  

$\sqrt{5}+\sqrt{2}\approx 2,23+1,41=3,64\approx 4-B$  

$2\sqrt{2}-\sqrt{5}\approx 2\cdot 1,41-2,23=2,82-2,23=0,59\approx 1-A$  

$12\sqrt{5}-2\sqrt{5}=10\sqrt{5}\approx 10\cdot 2,23=22,3\approx 22-N$  

Hasło: HEBAN