Mensa Practice Tests Compared: Which Free Test to Take First

Which Mensa practice test should you take?

Start with the free Mensa IQ Challenge, then add the practice test from your own Mensa branch if it has one. The table lists every branch test we opened on 24 October 2026.

• In the US: the Challenge is free, while the American Mensa home test is paid and sold only to valid US addresses.
• Outside the US: use the Challenge (or its twin, the Mensa Norway test) and your own branch’s test where the table shows one.
• German speakers: the Mensa Germany quiz mixes series and matrices, so it is a different mix from the Challenge, which Mensa also offers in German.

Does the Mensa home test qualify you for membership?

No. The American Mensa page says the home test will not qualify you for membership and cannot be used as qualifying evidence of prior testing. It does describe the result as a strong indication of your likelihood of success on the admission test, which is what makes it worth taking.

The same holds for every practice test. Mensa International’s FAQs say a pre-test is just for practice and cannot be used to qualify even if you score at or above the 98th percentile, and that online tests cannot be used for admission. American Mensa adds that it does not accept unsupervised testing as proof of eligibility.

Two routes qualify you. One is a supervised Mensa test. The other is an earlier score from an accepted test given by a qualified examiner: American Mensa’s list of qualifying scores shows a Wechsler full-scale IQ of 130, a Stanford-Binet 5 of 130 (132 on its general Stanford-Binet line) and a Cattell 148. The numbers differ because the tests use different scales; Mensa International notes that a 132 on one test can equal a 148 on another.

The benchmark is the 98th percentile. On a scale with a mean of 100 and a standard deviation of 15, as stated by Mensa Norway, that is about 130, which matches the Wechsler entry above. For the full list of accepted tests and cut-offs, see Mensa’s score requirements by test.

How close is a practice test to the real Mensa admission test?

A practice test differs from the admission test in supervision, length, format and what the result tells you. The admission test is taken in person with photo ID, and the practice tests above are taken alone at home.

Formats differ inside the practice tests too. The Challenge and Mensa Norway test are visual patterns. The German quiz adds number and letter series, odd-one-out figures and matrices, so it is not a pure pattern test. Mensa Italia is the one branch we read that links the two: it says the 45 questions of its admission test are similar to those of the preliminary test it recommends.

The admission format may also change. Mensa International’s FAQs say it is in the final stages of implementing computerized adaptive testing and that national groups will publish details. The page does not say whether that test will be supervised, so ask your national group. For more on why unsupervised online tests have limits, see how accurate online IQ tests are.

How should you practice without spoiling the real test?

Take each practice test once, because repeating the same form inflates your score.

A meta-analysis of retesting on cognitive ability tests, Hausknecht and colleagues (2007), found an adjusted overall effect size of 0.26, about a quarter of a standard deviation, across 107 samples and 134,436 participants. Gains were larger when the identical form was used and when practice came with coaching. The studies looked at people retested in selection settings, not at Mensa practice tests, so read the figure as the direction of the effect and not as a number you will gain.

A higher second score may reflect familiarity with the format; the score alone cannot show whether your reasoning improved. Because the Challenge and the Mensa Norway test are one test with two entrances, count them as a single practice attempt.

Mensa Italia’s FAQ says practice can lower stress but does not improve the result much, and still recommends a few tries on the Norwegian test beforehand. The same page allows one retake of its admission test, after at least six months. American Mensa lets you retake its test once every eight weeks. Limited retakes are the reason to practice on the free tests first. For general advice, see how to prepare for an online IQ test and whether you should retake an IQ test.

What practice score suggests booking the real test?

No practice score guarantees a pass, so a strong result is your cue to book. Mensa Netherlands calls its home test an indication, and American Mensa calls its home test a strong indication of likely success.

Scales matter. The Mensa Norway test reports between 85 and 145, so 130 sits inside its range, and a result near the top leaves little room to separate high scores. The Challenge reports nothing below 100, so it separates low and middling scores poorly. American Mensa’s admission test gives you no score at all, only whether you qualified.

Book when you have a strong result on at least two different practice tests, each taken once, with the Challenge and Norway test counted as one. Then check the fee and the retake limits in the admission table above: list prices are $60 in the US, €60 in Germany, €50 in France and €15 in Italy. A limited retake is worth more than the fee, so book when you are ready.

Where does an IQMog estimate fit?

An IQMog estimate is one more pattern-reasoning read you can take before you book. IQMog is a fixed form of 20 Raven-style visual pattern puzzles that takes about 10 minutes, with no strict time limit. Use it to see where you stand before you book Mensa’s supervised test.

It is free to take, and the full report is a one-time $4.99 (€4.99 incl. VAT for visitors from euro countries), with no subscription. The report gives you an IQ estimate, its score range, your percentile and a PDF to keep.

Our scale runs from 70 to 130, and each correct answer is worth 3 points. 20 of 20 correct gives 130, the top of the scale. How IQMog scores shows the method.

Illustration: 14 correct = 70 + 3 × 14 = 112, with a likely range of 100 to 124. The range comes from an assumed reliability and a fixed assumed norm, not a measured sample. IQMog measures abstract visual reasoning, the skill visual pattern puzzles draw on.