Vaidev and George have some brown notebooks and some pink notebooks. The number of pink notebooks Vaidev has is equal to the number of brown notebooks George has. ¹₅ of Vaidev's notebooks are brown and ⁴₅ of George's notebooks are pink. There are a total of 50 brown notebooks. Find the total number of notebooks they have.

Vaidev		George		Total
Brown	Pink	Brown	Pink
	1x4	1x4
1x1	4x1	1x4	4x4
1 u	4 u	4 u	16 u	25 u

The number of Vaidev's pink notebooks and George's brown notebooks is the same.

The number of Vaidev's pink notebooks is repeated. The number of George's brown notebooks is repeated.  Make the number of Vaidev's pink notebooks and George's brown notebooks the same.  LCM of 4 and 5 is 4.

Number of brown notebooks
= 1 u + 4 u
= 5 u

5 u = 50

1 u = 50 ÷ 5 = 10

Total number of notebooks
= 1 u + 4 u + 4 u + 16 u
= 25 u
= 25 x 10
= 250

Answer(s): 250