अंकों 5, 4, 2 और 7 का उपयोग करके बिना पुनरावृत्ति के कितनी 3-अंकीय सम संख्याएँ बनाई जा सकती हैं?

Seven ₹ 50 denomination notes, ten ₹ 100 denomination notes, ten ₹ 500 denomination notes, and one ₹ 2000 denomination note are distributed among 4 people W, X, Y, and Z such that each person has an equal number of notes. If W has an amount of ₹ 2700, what is the maximum amount that X can have?

How many different 4-digit numbers can be formed using the digits 1, 2, 3, and 4 if repetition of digits is not allowed?