The 2,300-year-old matrix is the world's oldest decimal multiplication table. From a few fragments out of a collection of 23-century-old bamboo strips, historians have pieced together what they say is ...

When you want to describe the size of an object compared to a smaller object, you can use the word ‘times’. For example, you can say an object is 'five times' as large or 'ten times' as large. This ...