IQ Tests

Hoeflin IQ Tests

Brainbreaker IQ Test: Spatial & Numerical

Brainbreaker IQ Test: Spatial & Numerical These 24 spatial and numerical problems were created by Ronald K. Hoeflin, Ph.D., and are taken from the "Brainbreaker," the "other half" of the famous Mega Test. The Mega Test has been taken by thousands of people, including Marilyn Savant of Parade Magazine fame, and John H. Sununu, then governor of New Hampshire and later Chief of Staff under President Bush, with both individuals achieving extremely high scores on the Mega. The Brainbreaker had been out of circulation for over 20 years, but we recently acquired all rights to it from Dr. Hoeflin. The Brainbreaker, like the Mega Test, is believed to measure intellectual ability above the 99.9999th percentile, which is one person in a million.

Around 1980, Hoeflin circulated a "100 Item Test" among members of some high IQ societies, and obtained normative data through people taking the test. The 100 Item Test was later split into 2 48 item tests (with 4 problems discarded). One test became the famous Mega Test, which was published in Omni Magazine in April 1985.

The Brainbreaker, the other test, was published in 1985, along with its answers, and so was no longer usable as an admissions test for high IQ groups (the Mega Test was still used for admissions until around 2000). The publication later went out of print, and the Brainbreaker disappeared into obscurity... until now.

The 24 spatial and numerical problems that constitute this test are the second half of the Brainbreaker test. The other 24 items, Verbal Analogies, appear on this site as a separate test. We also provide the original scoring chart for you to evaluate your performance (a "second opinion" if you will, since our site already provides estimated scores) on both tests combined at - According to this chart, answering 45 or more of the 48 problems correctly would equate to a score at or above the 99.9999th percentile: the one-in-a-million level.

Having the Spatial and Numerical Problems separate from the Verbal Analogies may be useful for individuals who do not use English as their primary language. While knowledge of the English language is certainly necessary for understanding many of the problems on this test, the focus is far more on spatial, logical, and mathematical reasoning, and less on vocabulary and cultural knowledge.

Some of the problems on this test were modified slightly from their original appearance in paper form. This is because some of the problems asked examinees to draw shapes or write out mathematical formulas, and our system would not be able to evaluate responses to these questions. Effort has been made to preserve the original format of the problems as much as possible, and most of the problems on the test are completely unchanged from their original formats.

Unlike most of our tests, you are encouraged to use a dictionary in book form, especially an unabridged dictionary such as Webster's Third New International Dictionary: or at least a "good" dictionary such as Merriam-Webster's Collegiate Dictionary, 11th Edition:, and any other books (but not electronic or online books - just standard books with paper pages). Please do not use any web sites, software, or the help of anyone else in working these problems. You may use paper, pen or pencil, and a standard or computer calculator.

Many of the problems are VERY difficult, and several may contain words, names or terms that you are unfamiliar with. Be sure to answer every problem, even if this means guessing on some problems. There are no penalties for guessing.

There is no time limit. Unlike most of our tests, for which we recommend "1 or 2 sessions," you may wish to spend more time on this test. Many people spent around a month working on the 48 item Mega Test before submitting their answers.

Your estimated IQ score, general population percentile ranking, and the answers to the problems are all provided when you complete the test.
Would you like to archive the results of this test in a personal account? If so, please login or register below.
Login (Return Visitors)
Register (New Visitors)
(Please note: Your score can only be recorded the first time you take a test. Subsequent scores will not be saved)