Brain Illusion: Try to correct it

Can you find the mistake ?

Brain Illusion: Try to correct it

Can you find the

the mistake ?

1 2 3 4 5 6 7 8 9

Solve this math problem to see answer.

There is double "the" (in first and second line) of sentence.

It belongs to Illusions category and tagged with brain illusions brain teasers optical illusions 90% fail to answer find the mistake