This skill is meant to entertain customers and engage them in a fun activity. This skill is just another mathematics trick. You are asked to guess a number and then follow a defined set of calculations on that number. With the final answer provided by the customer to this skill, Alexa finds out what number you guessed initially and what is your current age. This skill is designed to be very user-friendly. It's very simple to operate. You launch the skill first. Then, you have to simply keep moving with the steps. There are no difficult phrases to be used for this skill. You may/may not need a calculator for adding/subtracting huge numbers. It totally depends on how good you are at playing with numbers.