This is a fun little puzzle that is a bit trickier than it first appears.
A really cool logic game! Three thumbs up!
Changing the Border
Dividing a Quadrilateral
Help the missionaries and cannibals cross a river. The rowboat holds a maximum of two persons at a time. Beware: If the cannibals outnumber the missionaries on either bank, the missionaries will be eaten up.
Send all of the yellow frogs to the right side of the pond, and all of the red frogs to the left side of the pond. How many moves does it take?
Sniff out the clues and find the sneaky thief. A little bit of deductive reasoning, and an whole lot of fun!
When the centres of any three coins lie in the corners of an equilateral triangle of some size, such coins form an equilateral coin triangle. How many equilateral coin triangles of different sizes can you count in the figure?
The object of the puzzle now is to remove the minimum number of coins so that no equilateral coin triangles remain. In other words, centres of any three coins among those that remained don't lie in the corners of an equilateral triangle.
Students use the concept of Venn Diagrams to place each animal in the correct enclosure.
Two mind reading activities. The first one can be explained using knowledge of linear expressions, while the second one is just a bit of fun.
A triangle is made up of four pieces. Move the pieces around to make a new congruent triangle. Except the new triangle is missing one square unit! Where did it go?