Solve This (? + ? + ?=30)

If 1111=R, 2222=T, 3333=E, 4444=N Then 5555=?

Guess the Hindi Muhawara from the following whatsapp Emoticons?

Sweet, Medicine, Film, Girl, City, Car, Place, Doggy all are name same, guess which word it is?

Guess me who am I, I am the first on earth, the second in heaven...

What invention in the 17th century revolutionized mathematics by providing the first systematic link between Euclidean geometry and algebra, describing geometric shapes as algebraic equations involving the coordinates of the points lying on it?

Cyrus the Great of Persia, for his religious tolerance, power and skill the only non-Jew to be acclaimed as the Messiah, founded the Achaemenid Empire in the 6th century BCE which stretched how far?