021: Crossfigures

Proposed by Toby Walsh

Crossfigures are the numerical equivalent of crosswords. You have a grid and some clues with numerical answers to place on this grid. Clues come in several different forms for example:

• Across 1: 25 across times two,
• 2: five dozen,
• 5: a square number,
• 10: prime,
• 14: 29 across times 21 down