import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes")
no = lambda :print("no");No = lambda :print("No")
#######################################################################
for _ in range(ni()):
    n,m = na()
    n %= 2*m
    x = n * (n+1) // 2
    print(x%m)