Can first graders really figure this out in 20 seconds?

Can first graders really figure this out in 20 seconds?

Take a look at the picture below.  According to the text, it’s a question given to 1st grade students in Hong Kong as part of an admissions test.   I guess my question is, why does a first grader need to know this in under 20 seconds?  Does it prove intelligence somehow?  It took me longer than 20 seconds to figure it out.  I’m 44 years old.  I managed to graduate at the top of my class in high school.  So what makes this question special or predictive of anything?

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