Problems

Age
Difficulty
Found: 258

On the table four figures lie in a row: a triangle, a circle, a rectangle and a rhombus. They are painted in different colors: red, blue, yellow, green. It is known that the red figure lies between the blue and green figures; to the right of the yellow figure lies the rhombus; the circle lies to the right of both the triangle and the rhombus; the triangle does not lie on the edge; the blue and yellow figures are not next to each other. Determine in which order the figures lie and what colors they are.

One day a strange notebook was found on the stairs. It contained one hundred statements:

“There is exactly one incorrect statement in this notebook”;

“There are exactly two incorrect statements in this notebook”;

“There are exactly three incorrect statements in this notebook”;

...

“There are exactly one hundred incorrect statements in this notebook.”

Are any of these statements true, and if so, which ones?