Question

what block do I exchange 1/3 1/9 1/18 1/36 to 1/12 7/18 4/72 8/36 the make the same answer

Answer 1

Answer:

In this series, each number is the sum of the two preceding numbers. For example, 3 = 1 + 2, and 5 = 3 + 2. Therefore, the number following 13 must be 13 + 8 = 21, and the next number must be 21 + 13 = 34.

Answer 2

Step-by-step explanation:

see attachment so you can see