Today's PUZZLE CLASSIC OF THE DAY
PREVIOUS 12 DAYS
What is It?
A half is a third of it. What is it?
Bookworm
A bookworm finds itself on page 1 of volume 1 and begins eating straight through to the last page of volume 5. If each book is 2 1/2“ thick, including the front and the back covers, which are 1/4“ each, what is the distance the bookworm travels?
Two Trains
A nonstop train leaves A for B at 60 miles per hour. Another nonstop train leaves B for A at 40 miles per hour. How far apart are the trains 1 hour before they pass each other?
The Missing Symbol 2
Draw the option which should replace the question mark.
The Missing Symbol
Which option should replace the question mark in order to complete the top sequence?
A Swarm of Bees
Here is one problem from an ancient Indian treatise. If 1/5 of the bee swarm flew to lavender flowers, 1/3 to linden flowers, the triple difference of these numbers flew to the tree, and one bee continued to fly between fragrant ketaki and malati, then how many bees were there?
Magic Square
Arrange the numbers 1-9 in the cells of the 3x3 square so that the sum of every row, column and each of the two main diagonals is the same. What sum it should be?
Magic Circle
Place the digits 1-9 in this circle so that every straight line across the wheel adds up to 15. Digit 7 is already placed in the wheel.
1 to 8 into the Vertices of a Cube
Place the digits 1 to 8 into the vertices of a cube so that the sum of the digits on each cube's face is the same.
Magic Triangle-20
Arrange digits 1 through 9 along the sides of the triangle so that the numbers along each side add up to 20.
Magic Triangle-17
Digits 1, 2, and 3 are placed in the vertices of the equilateral triangle. Add digits 4-9 along the sides of the triangle so that the digits' sum on each side is 17.
Sphere & Cylinder: Surface Areas
A sphere fits exactly inside a thin-walled cylinder that has a height and the diameter equal to the diameter of the sphere. Let's mark the surface area of the sphere as SA(s) and the lateral surface area (which is EXCLUDING the bases) of the cylinder as LSA(c). How SA(s) is related to LSA(c)?