Find the missing numbers in the following factorization.

Let’s start from the bottom -

The factors of last numbers are 11 and 5.

So last number is 11 × 5 = 55

Now factors of the second number from bottom is 55 and 3

So second last number is 55 × 3 = 165

Also factors for the third number from bottom is 165 and 2.

So third last number is 165 × 2 = 330

Similarly factors for the first number is 330 and 2.

So first number is 330 × 2 = 660