Kakuro
Cross sums: fill each white run with digits that add up to its clue, with no digit repeated. Crossing runs narrow every cell down to one.
Number puzzles and maths games
Number puzzles mix arithmetic with logic. Some ask you to reach an exact total, some to fill a grid so every run adds up, and some simply test how fast you can work things out in your head.
Pick a timed drill to sharpen your mental maths, or slow down with kakuro and target puzzles where every number has to earn its place.
Target Rush
Merge number tiles with + − × ÷ to land exactly on the target. No negatives, no fractions, and from the second tier every tile must be used.
Rapid Maths
Timed mental arithmetic: type each answer to move on, climb from simple sums to bracketed chains, and aim to get nine in ten right first time.
Domino Plots
Lay every domino from the tray so each coloured plot keeps its rule: a total, under or over a number, all the same, or all different.
Number Trail
Draw a single line through every cell, connecting the numbers in order and finishing on the last. Walls block the way, and each grid has one answer.