Between them Anish, Jason and Rob have 40 swap cards. Jason has twice as many as Anish, and Rob has five times as many as Anish.

How many does Anish have?

1 answer

Let's assume Anish has x swap cards.
Jason has twice as many as Anish, so Jason has 2x swap cards.
Rob has five times as many as Anish, so Rob has 5x swap cards.
The total number of swap cards is x + 2x + 5x = 40.
Combining like terms, we get 8x = 40.
Dividing both sides by 8, we get x = 5.
Therefore, Anish has 5 swap cards. Answer: \boxed{5}.