Question

Ted gave a puzzle to Sarah and asked her to solve it. Can you help her find the missing number?

Answer 1

From the given image, we can observe that the logic used is as follows:

Number in the 3rd column of every row = Number in the 1st column + Number in the 2nd column + Number in the 2nd column

Following this, we observe:

20 = 4 + 8 + 8

Similarly, 15 = 9 + 3 + 3

So, the missing number will be 6 + 6 + 6 = 18.