Er, what? If I look at the clock and see it’s 0955 I know exactly that it’s 35 minutes. Same for every other example you give. If it’s 1252, it’s so easy to add 8 minutes then add whatever it is more. And you can do that for any time. Say 1017. “Oh no!” Never fear, the just add it to the time wangs are here: +13 to 30 and woah! Easy, foolproof and actually intuitive