Math challenge skill allows you to choose to add, subtract, multiply, division, or random, and the maximum number of your choice to play. You will be asked 5 questions and each correct answer will be awarded with 10 points.
If you are beginner, try with a lower number as low as 1, but that is no fun. So try playing as far as you could. You will be given brief time to calculate and tell the answer so grab pen and paper if you like to.
You can start playing the game by saying,
Alexa, open maths challenge Alexa, ask maths challenge for addition Alexa, open maths challenge for random
There is timer allow you to calculate, but if you know the answer already, you can say "Alexa, is it" followed by your answer.