The map shows 11 of a village’s 12 houses. There are four straight roads and four circular roads. Each road must have exactly 3 houses. Where should the last house go?
The card shows a circle, square and upward-pointing triangle. It is flipped over its top edge, then over its left edge as shown. What does it look like after both flips?
Tom places the nine cards so each row and column has three different shapes and three different counts. Three cards are already placed. Which card goes in the grey cell?
Two identical trains, each with 31 cars, travel in opposite directions. When car 19 of one is opposite car 19 of the other, which car is opposite car 12?