Setup

npm install -g project-lvl1-s101

Determine whether the number is even

$ brain-even

Calculate an expression

$ brain-calc

Calculate a greater common divisor

$ brain-gcd

Balance a number (A balanced number is a number in which the smallest digit differs from the largest one by more than one.)

$ brain-balance

Find out the missed element of arithmetic progression

$ brain-progression

Determine whether the number is prime

$ brain-prime