Puzzles & Illusions
Easy Medium Hard
by Gianni A. Sarcone and Marie-Jo Waeber
Puzzle No 1.
A.
E L
P M
B.
Šwww.archimedes-lab.org
A S
C.
E L
P M
Watering can problem Marc’s sister is a garden hobbyist. One day, she went to a garden center to buy a watering can. The sales-clerk suggests 3 possible variants having however the same base surface: watering can A, which costs 3.00 dollars; B, which costs 3.50 dollars; and C, that costs 2.00 dollars. What is in your opinion the most convenient if your choice is imposed by the capacity?
A S
Keyword: capacity = the maximum amount that something can contain.
A.
Logic
E L
P M
B.
A S
C.
Watering can problem
The watering can A because it is cheaper than B and can contain the largest capacity compared to the other two sets. The amount of water that can be kept within each watering can is determined by the HEIGHT of the drum and, above all, of the spout. The water level cannot rise above the spout opening since any extra water would merely spill out from the spout. A simple visual estimate would conclude that the spout of watering can A is higher to that of watering can B. Distributed by Knight Features www.knightfeatures.com