twice a number n

To determine twice a number n, you simply need to multiply the number by 2. Multiplying a number by 2 effectively doubles its value. So, to find twice a number n, multiply n by 2.

Mathematically, the expression "twice a number n" can be represented as 2 * n, where * denotes multiplication. Therefore, 2 * n gives you the result of doubling the value of n.