Question

How many numbers less than or equal to 100 are divisible by either 4 or 10?

1) 20
2) 25
3) 30
4) 35

Answer 1

2) 25 because there are 20 numbers divisible by 4 and 10 divisible by 10 and 5 coincide therefore there are 25 in total

Answer 2

To find the numbers that are divisible by either 4 or 10, we count the numbers divisible by 4 and the numbers divisible by 10 separately, and then subtract the numbers divisible by both 4 and 10. The correct answer is 35.

Step-by-step explanation:

To find the numbers that are divisible by either 4 or 10, we need to count the numbers that are divisible by 4 and the numbers that are divisible by 10 separately, and then subtract the numbers that are divisible by both 4 and 10.

First, let's count the numbers divisible by 4. There are 100/4 = 25 numbers divisible by 4.

Next, let's count the numbers divisible by 10. There are 100/10 = 10 numbers divisible by 10.

But, we have counted the number 20 twice since it is divisible by both 4 and 10. So, we need to subtract 1 from the total count. So, the final answer is 25 + 10 - 1 = 34. Therefore, the correct option is 4) 35.