G-35 ・ Perception ・ 2 min

Overpay Check — Catch the padded invoice

A browser game where you check an invoice before paying it, as if you had ordered design work, a repair or a video edit. Each made-up invoice has exactly one number that is off in the seller’s favour: a line multiplied too high, a total added too high, two digits swapped (1,890 → 1,980), 10% tax charged on an 8% item, or a padded tax amount. All five kinds appear once a day. Tap the number that’s too high and a red pen circles it, writes the right figure and the total drops. Tap a correct number and you see the check right there, plus a 3-second penalty. If the clock runs out or you press “Pay as is”, the overpayment adds up. Tax follows one house rule: applied once per rate to that rate’s subtotal, rounded down. The first invoice is an untimed warm-up. The daily five are the same for everyone (set by the date in Japan) and only your first run is recorded on this device. From the result, jump straight into five fresh practice invoices. All businesses and items are fictional; this does not check or create real invoices. Free, no sign-up.

How to play

Tap the one number that doesn’t add up and is too high. Quantities and unit prices are as ordered; the error is in an amount, a subtotal, a tax or the total
Tap a correct number and the check appears, with a 3-second penalty. Tap the padded one and it’s corrected and the total drops
Tax is applied once per rate (10% and 8%; ※ marks 8%) to that rate’s subtotal, rounded down
Run out of time or press “Pay as is” and you’ve missed it. Lowest total overpayment wins; time breaks ties

Keyboard: Tab or ←→↑↓ choose a number / Enter or Space tap it / P pay as is / Enter next invoice / R practice five from the result

← All games Guide Made by: First CH LLC