Frank has a 2-digit number on his baseball uniform. the number is a multiple of 10 and has 3 for one its factors. what three numbers could frank have on his uniform?
a. what do you need to find?
b. what information do you need to use?
c. how can you solve the problem?
d. complete the sentence. frank has a his uniform. the number is a multiple of one factor of the number is frank could have or on his uniform.

2 digits number

x <100   because 2digit

x/10  ∈ { 1, 2, 3, 4, 5, 6, 7, 8, 9}

x/3  ∈ {1, 2, 3, 4, 5, 6, 7, 8, 9 }

max number divide by 10 is 90
max number divided by 3 is 99

because we know that numer is divided by 10 so our collections looks like:

{10, 20, 30, 40, 50, 60, 70, 80, 90}

we look from this collections only numbers witch will divided by 3:

30, 60, 90 = this is solutions

a) we need a natural number divided by 3 and 10 lower than 100
b) i need to use lenght of number and what numbers divides them
c) as above
d) baseball, 3 and 10, 3, 30,60,90