Final answer:
To find all the possible numbers of rows without having to check if 8 is a factor of every number between 70 and 150, you can use the concepts of divisibility by 2 and 4.
Step-by-step explanation:
To find all the possible numbers of rows without checking if 8 is a factor of every number between 70 and 150, we can use the concept of divisibility. Since 8 is divisible by 2 and 4, we need to check if the numbers between 70 and 150 are divisible by both 2 and 4. Divisibility by 2 means that the last digit of the number is even, and divisibility by 4 means that the number formed by the last 2 digits is divisible by 4. By applying these rules, we can quickly identify the numbers that are divisible by 8 within the given range without checking each individual number.