for _ in xrange(int(raw_input())):
	health, armor = map(int, raw_input().split())
	ans = 0
	while True:
		health += 3
		armor += 2
		ans += 1
		if health > 5 and armor > 10:
			health -= 5
			armor -= 10
			ans += 1
		elif health > 20:
			health -= 20
			armor += 5
			ans += 1
		else:
			break
	print ans