import sys

input = sys.stdin.buffer.readline

t = int(input())


def divide(n):
    res = set()
    for i in range(1, int(n ** 0.5) + 1):
        if n % i == 0:
            res.add(i)
            res.add(n // i)
    return res


for _ in range(t):
    n, m, k = map(int, input().split())

    num = k % m

    mn = m - n
    yakusu = divide(num)
    ans = -1
    for a in yakusu:
        if mn <= a:
            ans = 0
            break
    if ans == -1:
        ans = num % mn
    print(ans)