Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

The arrow reaches the number 85. The number line goes from 0 to 1000. The easiest thing to do first is to figure out where the halfway point, 500, is. This will help estimating the value of the ...

The arrow reaches the number 85. The number line goes from 0 to 1000. The easiest thing to do first is to figure out where the halfway point, 500, is. This will help estimating the value of the ...