The __________ of any two non-zero whole numbers is the smallest or the lowest common multiple of both the numbers.

The Least Common Multiple (LCM) of any two non-zero whole numbers is the smallest or the lowest common multiple of both the numbers. In other words, we can say that the LCM is the smallest number which divides any two or more given numbers, completely.

For example, the lowest common multiple of 2 and 3 can be found out as follows:

Multiples of 2: $2,4,\mathbf{6},8,10,...$

Multiples of 3: $3,\mathbf{6},9,12,15,...$

Therefore, the lowest common multiple of 2 and 3 is 6.