Answer to Q1.
Here is the completer "subhAshitham"
apUrvha kopi koshoyam vidyate tava BhArati |
vyayato vrudhiM aAyAti KshayaM aAyAti sanchayAt ||
Meaning: Oh Godess BhArati( Saraswathi),your treasure of knowledge is amazing. It keeps increasing as one spends it and keeps decreasing as one keeps it to himself.
I gave a crude meaning...additions are welcome.
Q2:
yathaA sikhA mayUrAnAm
Hint: Mathematics ....
--Surya