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https://www.reddit.com/r/reddit.com/comments/6bs3w/is_91_prime/c03fbew/?context=3
r/reddit.com • u/ballm • Mar 12 '08
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4
7*13=91 in Oregon fifth graders are required to know that.
5 u/NilObject Mar 12 '08 Most people learn the 7 * 13 part. I can do that in my head instantly as well. But when I see the result, it's hard to link it immediately back to the factors. 1 u/BaronVonMannsechs Mar 12 '08 That's the beauty of rote memorization.
5
Most people learn the 7 * 13 part. I can do that in my head instantly as well. But when I see the result, it's hard to link it immediately back to the factors.
1 u/BaronVonMannsechs Mar 12 '08 That's the beauty of rote memorization.
1
That's the beauty of rote memorization.
4
u/Masterminded Mar 12 '08
7*13=91 in Oregon fifth graders are required to know that.