Puzzle 16

Branch of mathematics with equations, e.g. x-2=6.

Device worn when playing virtual reality games.

Female distinguished pilot lost in Pacific.

A group of four musicians.

Chunks of gold.

Nottingham official who was Robin Hood's foe.

Wizard hero in The Lord of the Rings.

Month of All Hallows' Eve, or Halloween.

Changes made to improve a bad process.

The city where the Flintstones live.

Handheld game __, like a Game Boy.

A surgeon's extremely sharp knife.

Digits on one's hands.

Apprentice learning the ropes in a new job.

Turn over one of these, make a fresh start.

A king or queen; a hereditary ruler.