difference between samas and sandhi in hindi

in diye gaye shabdon ka sandhi viched kijiye

1)sukti

2)surendr

3)umesh

4)varshikotsav

5)purushottam

6)lokokthi

7)mahoday

8)mahormi

9)rajarshi

10)brahmarshi

i m not understanding  sandhi plzzzzzz help me after  4 days  there are my exams

संधि विच्छेद - कवि , नैतिक और नाविक ?

Please answer it as soon as possible...

this is in hindi:

sandhi viched kiegeye :

1)vaagmai

2) udhaar

Mitrata ka sandhi viched kya hai ??????????

 what is svarsandhi?????? Pls ans fast, i've got my final exam 2moro!!

SANDHI?