19 June, 2018

Lucy`s Secret Number puzzle

This article is a repost promoting content originally published elsewhere. See more things Dan's reposted.

Lucy’s Secret Number puzzle (datagenetics.com)

You are at a party and overhear a conversation between Lucy and her friend.

In the conversation, Lucy mentions she has a secret number that is less than 100.

She also confesses the following information:

“The number is uniquely describable by the answers to the following four questions:”

Q1) Is the number divisible by two?
Q2) Is the number divisible by three?
Q3) Is the number divisible by five?
Q4) Is the number divisible by seven?

…

DataGenetics

I loved this puzzle. I first solved it a brute-force way, with Excel. Then I found increasingly elegant and logical solutions. Then I shared it with some friends: I love it! Go read the whole thing.

Dan Q found GLW489XJ Bird watching

This checkin to GLW489XJ Bird watching reflects a geocaching.com log entry. See more of Dan's cache logs.

A quick and easy find on a diversion from my morning cycle commute. A man parked in a van nearby made me think I’d need to use my stealth skills, but he turned out to be asleep. Not sure how this cache will stand up against the winter weather, but for now this is a great spot and I was glad of the excuse to visit. TFTC!

Dan Q found GLW487M0 Curse of the FTF – Oxfordshire #8 – Pond life

This checkin to GLW487M0 Curse of the FTF - Oxfordshire #8 - Pond life reflects a geocaching.com log entry. See more of Dan's cache logs.

Took an unusual route to work this morning and as it put me in the vicinity of this cache I decided it was high time I braved the brambles and the risk of damp feet (it’s a bit boggy here right now!) to find this cache. TNLN, TFTC!

Dan Q found GLW4865N Route Canal – Green Lock

This checkin to GLW4865N Route Canal - Green Lock reflects a geocaching.com log entry. See more of Dan's cache logs.

Third time lucky! After striking out twice I spent some time thinking about possible hiding places before returning for this third, successful, visit. TFTC!