My memory lasts only 80 minutes

The Housekeeper and the Professor is a story about a mathematical genius who suffers from a memory disorder and walks around with reminder notes pinned to his suit, one of which says ‘My memory lasts only 80 minutes’.

It’s a beautiful story and absolutely a recommendation. But aside from the story, I got fascinated with mathematical terms and expressions described in the book; especially with different kinds of numbers, such as imaginary numbers, amicable numbers, prime numbers, twin primes and triangular numbers. Can you figure out what they’re called in Japanese?

Well, I know you’re not here for numbers. Are you ready to learn a phrase now? And instead of the sentence ‘My memory lasts only 80 minutes’, I’ll give you this: My phone battery lasts only 8 hours.

▼ 日本語訳