A system of two symmetrical, identical, water-filled jars is fixed on a turntable. Each jar has a cork—attached to the bottom by

Question Two of the following statements are true and the other one is false: This statement is true. The first statement is false

True or False? The sum of two consective triangular numbers is always a square numbers!

Which string will break first? a. Horizontal String!, b. Vertical String!, c. Both will break at the same time

If a number n can be factored as a×b then n will appear in row a+b-1. For example the number 6 appears in row 1+6-1=6 but also ro

Nine consecutive integers are placed in the squares of a 3x3 grid. Every column, every row, and every diagonal add up to the same

What time is it?

All four Kings from a deck of cards are placed face down on a table in a random order. You select two of them, and if both are the

How many quadrilaterals are drawn in this figure? Hint: Be sure to count both convex and concave quadrilaterals.

A light ray emitted from a vertex of this isosceles triangle reflects 6 times before reaching another vertex. What is the total

Place the ten integers 2 through 11 into the ten squares such that the sum of the numbers in each 2x2 square is the same value, P.

Regular hexagon patio blocks of area 1 are used to outline the garden shown, with n=5 blocks on each side placed edge to edge.