Mindbender

A: Jane is one and a half times as old as Jack was when Jack was half as old as John is.

John is one and a half times as old as Jane was when Jane was half as old as Jack is.

We have taken ages in completed years, and Jane is in her teens. How old are the two boys?

B: John came in from the garden. "It all looks different," he said. "You've made the lawn square and a lot smaller."

"That's right, just half the area it was," Charlie replied. "Eva wanted more space for flowers, so I chopped off 2 metres from its width, and made it 3 metres shorter." What were the new dimensions?