This uninhabited isle 10 miles (16 kilometers) off the coast of southwest Scotland is the source of the super-dense granite used to make curling stones for the Winter Olympics. Jim English, co-owner ...

To do the method, begin by writing the two numbers you want to multiply at the top of two columns. In the left column, you ...

The obvious answer is the number of clutches. But it goes beyond that, into questions of design and operation that can bring ...