9 Sofia counts in threes starting at 3. 3, 6, 9, 12,...15 18 21 Zara counts in fives starting at 5. 3.1 Counting and 5, 10, 15,

Question

1 year ago

5

20, ... They both count on. What is the first number greater than 100 that both Sofia and Zara say? 105 Explain your answer.

1 answer:

timurjin [86] · Answer 1 · 2024-07-13T11:20:35+03:00

The most appropriate choice for multiple will be given by-

First number greater than 100 that both Sofia and Zara say is 105.

What is a multiple?

On multiplying one whole number with another whole number, we get multiples.

Here,

Sum of digits of 105 = 1 + 0 + 5 = 6

6 is divisible by 3

So 105 is divisible by 3

So Sofia will say 105

Last digit of 105 = 5

So 105 is divisible by 5

So Zara will also say 105

So Sofia and Zara will both say 105 as 105 is a multiple of both 3 and 5

Now 101, 103, 104 is not divisible by both 3 and 5.

So nobody will say 101, 103, 104

Now 102 is only divisible by 3. So Sofia will only say 102

So first number greater than 100 that both Sofia and Zara say is 105.

To learn more about multiples, refer to the link:

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