Mary is buying cups, plates and forks for her party. cups are sold 6 in a package, plates are sold 9 in a package and forks are sold 10 in a package. if she wants to have the same number of each item for her party, what is the smallest number of packeges of each that she should buy?

90

Step-by-step explanation:

So first you got to see what matches with 10 because it is the biggest number

So if you multiply 10x9 you get 90 then you see if you can make a lower

number fit with 6 like halving it. But 10 does not fit with 45 and so doesn't 6 so  

if you also multiply 10x6 you get 60 but 9 doesn't get in so the only lowest

number is 90

7! = 7×6×5×4×3×2

3! = 3× 2

as 7! is multiple of 3! because 7! contains 3! that is 3× 2 as factor

so 7! /(3! ) = 7× 6× 5× 4

= 42 × 20

= 840

its b) 840✌✌✌

dhruv⭐