Answer:
60, 90
Explanation:
Since they need to be a multiple of all 3 numbers, it narrows the answers possible.
The numbers that are multiples of 2 in the range are:
56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100
The numbers that are multiples of 6 in the range are:
60, 66, 72, 78, 84, 90, 96
The numbers that are multiples of 10 in the range are:
60, 70, 80, 90, 100
By finding all the multiples, you will find the only 2 numbers that match between all 3 are 60 and 90.
There is a simpler way of doing this as well, but it is not as visual as the first method.
With a multiple of 10, you know the number will always end with a 0, so that limits the options greatly. Also, you know that any number that ends with a 0 is a multiple of 2, meaning that any multiple of 10 is also a multiple of 2.
So all you have to do is find the multiples of 6 in the range that end with a 0, and those are your numbers.
So for this, it would be 60 and 90.
Hope this helps!