Either take a 30-second test or a 60-second test initially, then try the default time of 2 minutes to see how many questions you can get right.
Use a mixture of all four arithmetical operations (+ – × ÷) with numbers from 2 up to and including 100, but you can choose simply to focus on one or more of these operations if you wish, and use smaller numbers too.
Start easy and build up the difficulty.
Take the challenge
Have some fun while improving your mental arithmetic and see if you can beat your own personal best by getting a record number of questions correct.
Can you achieve an amazing 50 correct answers in 2 minutes?
Let us know your personal record when using the default settings. I await your response on twitter at @7puzzle.
CLICK HERE and enjoy!