AIMESuperchallenge ShareAIME · Superchallenge problemHow many ordered quadruples (a,b,c,d)(a, b, c, d)(a,b,c,d) of integers satisfy 0≤a,b,c,d≤70 \le a, b, c, d \le 70≤a,b,c,d≤7 and a+b+c+d=20a + b + c + d = 20a+b+c+d=20?Check Show answer Walk through it step by step Practice more like this