Problem 50412. Number Puzzle - 075

Created by Doddy Kastanya

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<div style = "text-align: start; line-height: 20.44px; min-height: 0px; white-space: normal; color: rgb(0, 0, 0); font-family: Menlo, Monaco, Consolas, monospace; font-style: normal; font-size: 14px; font-weight: 400; text-decoration: none solid rgb(0, 0, 0); white-space: normal; "><div style="block-size: 21px; display: block; min-width: 0px; padding-block-start: 0px; padding-top: 0px; perspective-origin: 407px 10.5px; transform-origin: 407px 10.5px; vertical-align: baseline; "><div style="font-family: Helvetica, Arial, sans-serif; line-height: 21px; margin-block-end: 9px; margin-block-start: 2px; margin-bottom: 9px; margin-inline-end: 10px; margin-inline-start: 4px; margin-left: 4px; margin-right: 10px; margin-top: 2px; perspective-origin: 384px 10.5px; text-align: left; transform-origin: 384px 10.5px; white-space: pre-wrap; margin-left: 4px; margin-top: 2px; margin-bottom: 9px; margin-right: 10px; "><span style="block-size: auto; display: inline; margin-block-end: 0px; margin-block-start: 0px; margin-bottom: 0px; margin-inline-end: 0px; margin-inline-start: 0px; margin-left: 0px; margin-right: 0px; margin-top: 0px; perspective-origin: 0px 0px; transform-origin: 0px 0px; "><span style="">Find all four-digit prime numbers whose digits are monotonically increasing from left-to-right.</span></span></div></div></div>

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Last Solution submitted on Apr 16, 2022

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Nikolaos Nikolaou on 17 Feb 2021

monotonically increasing means < not <= Doddy

goc3 on 16 Apr 2022

According to the New Oxford American Dictionary, monotonic means "varying in such a way that it either never decreases or never increases." If something monotonically increases (i.e., never decreases), >= is appropriate. In like fashion, if something monotonically decreases (i.e., never increases), <= is also appropriate.

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Problem 50412. Number Puzzle - 075

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Problem 50412. Number Puzzle - 075

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