Maths Play

In the first variation, the player will have to solve regular math problems.

He first chooses the kind of operation (addition, subtraction, multiplication or division), next the skill level (1-3) and then is presented with the problems.

He must type in the answers, and the computer will register the time elapsed and the number of current problems solved.

If the player fails twice to solve a problem, the game is over.

The second variation displays algebraic problems.

The player selects the desired skill level (1-3) and has to enter the missing variable to each problem, and the rules are the same to the first variation.

The third variation is a addition or multiplication table game.

The player chooses addition or multiplication, then the number he wishes to practice.

Echo! is a basic Simon game (as invented by Ralph H.

Four colored numbers (red, blue, green, and yellow) will appear on the screen.

One of them will light up, and a tone will be played.

Then it is the player's turn: he has to match the lit up number.

Then, the first number will be light up followed by a second one.

The player has to match the sequence and it will keep increasing indefinitely.

If the player fails three times to match a sequence, the game is over.

Maths Play for Nintendo DS is currently worth €5.18 loose, €4.32 complete in box, and €7.87 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

Maths Play has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Maths Play, loose is €5.18 and CIB is €4.32 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.