Here are two different factor trees for 60. Write the missing numbers.

(a)


(b)

(a) Lets take ‘a’ be the missing number,


So, we have,


2 × a = 6


a = 6/2 = 3


a = 3


So,


2 × 3 = 6


And


5 × a = 10


a = 10/5 = 2


5 × 2 = 10


Missing numbers are 3 and 2.


(b) As we know 60 = 30 × 2


30 = 10 × 3


10 = 5 × 2


Missing numbers are, 2, 5, 3 and 2.


5