#3 Page turner
Set by Katie Steckles
When printing books, the page numbers are included in the corner of each page.
If a book has 24 pages, how many digits are used in printing all the page numbers?
If a book uses 183 digits in printing all the page numbers, how many pages does it contain?
If another book uses 636 digits in printing all the page numbers, how many pages does it have?
Solution next week
#2 Piles of money
Solution
With six tokens, the maximum winning total is 拢9 (3脳3).
For 10 tokens, this total is 拢36 (3脳3脳4).
In general, you should make piles of as many 3s as you can, then either a 2 or a 4 (or equivalently, two 2s) with what is left.
Quick quiz #235
set by Bethan Ackerley
1 In geology, rocks rich in magnesium and iron are known as what?
2 Who is the 1956 experiment that disproved the conservation of parity in particle physics commonly named after?
3 Which of our solar system's known moons has the most eccentric orbit?
4 What are the forces that attract neutral atoms together in a gas?
5 Which of the following plants isn't a member of the Rutaceae family: the curry tree, the orangeberry or the jackfruit?
Quick quiz #235
Answers
1 Mafic
2 Chien-Shiung Wu, who led the experiment
3 Nereid, a moon of Neptune
4 Van der Waals forces
5 The jackfruit