7 + 2 = x + 6. Can you solve for "x" ?

Certainly you can.  Probably in less than 5 seconds, or you wouldn't be reading this blog.

But... one-fourth of incoming University of California San Diego freshmen taking a placement exam last year failed to solve for the x.

And... 3/5 of them failed to round 374,518 to the nearest hundred.

I found those numbers in the May 2026 Harper's Index, attributed to Akos Rona-Tas, University of California, San Diego.  A Google search led me to confirmatory editorial commentary in the San Diego Union Tribune.

"... it is so jarring to read a lengthy new report from UCSD’s Senate-Administration Working Group on Admissions that says many students can’t answer simple math questions. “Between 2020 and 2025, the number of students whose math skills fall below middle-school level increased nearly 30-fold, reaching roughly one in eight members of the entering cohort,” it stated.

Some 25% of students in need of remedial math training couldn’t figure out the answer to this equation — 7 + 2 = blank + 6 — the sort of problem that California first-graders are expected to master. And 61% were unable to round the number 374,518 to the nearest hundred — a basic task third-graders are drilled on..."

From what I've read elsewhere, it appears that UCSD students take the placement exam in order to assess what level courses they should enroll in in the STEM programs.  So the low numbers would seem to reflect science-interested students, not necessarily the liberal arts-focused students.

A number of potential causes are cited, including grade inflation during high school:

But the last cause on that list — high school grade inflation — is something that UCSD can’t fix. It is part of a far-reaching educational crisis that demands a much broader response.

The report said even the students admitted in 2024 who were most in need of remedial support had high school math grade point averages of better than 3.6 — and the difference in such GPAs between the least and most prepared entering students was very small.

If you're interested, here is one Math Placement Exam from UCSD, which you can take at home privately and for free.  It seems to start easy and get harder as you go along.  I didn't see these particular questions on this particular placement exam. 

Related:  Over the years I have hired a number of bright young neighborhood high schoolers to help me with yard and garden chores, and I sometimes challenge them with math and geometry puzzles from the mathematics category of this blog to ponder while they walk in diminishing circles behind a mower, or to take home to work out.  Last year I messaged a new puzzle to a high-school junior.  The correct answer came back in a few hours.  I told him I was impressed.  He said he and his friends couldn't figure it out, so they plugged it into ChatGPT...