My mom would only have a 50% chance of correctly adding four single-digit numbers, and if she had to divide them by 3, she'd be lost. She's an intelligent woma

My mom would only have a 50% chance of correctly adding four single-digit numbers, and if she had to divide them by 3, she'd be lost. She's an intelligent woman who's just lousy at arithmetic. I'd guess hers would be approximately the median experience if something like this became standard.