Puzzle 1. You are playing solitaire in the first quadrant of the Cartesian plane, the lower
corner of which is shown in Figure 1. You begin with a single checker on square a1. On …

But, to my surprise, Erdös said,“No, that is impossible, it should make no difference”... Erdös
objected that he still did not understand the reason why, but [after being shown a simulation …

We discuss fun problems, vaguely related to notions and theorems of a course in differential
geometry. This paper can be regarded as a weekend''treasure chest''supplementing the …

Gardner's two children problems and variations: Puzzles with conditional probability
and sample spaces Page 1 Wendy Taylor Bentleigh Secondary College, Vic. taylor.wendy.c@edumail.vic.gov.au …

In the Australian mathematics curriculum, Year 12 students (aged 16-17) are asked to solve
conditional probability problems that involve the representation of the problem situation with …

You know that a two-child family has a son. What is the probability that the family has two
sons? And what is this probability if you know that the family has a son born on a Tuesday …

Abstract Initially proposed by Martin Gardner in the 1950s, the famous two-children problem
is often presented as a paradox in probability theory. A relatively recent variant of this …

다'라는 정보를 입수했을 때 '상금 씨의 두 아이가 모두 딸이다'를 우리는 얼마큼 믿을 수 있는가?
이 확률이 1/3 이라는 것은 거의 분명해 보인다. 그런데 상금 씨가 '보미는 내 딸이다'라는 정보를 …

In this chapter, we question the tendency in secondary schools to present the notion of
probability exclusively through scenarios where all necessary information is readily …

Martin Gardner's two-children paradox posits two scenarios, in one we know that of two
children one is a girl, and in the other we know that of two children the older one is a girl …