Head Games

March wits with the Mensa puzzler

Join Our Community of Science Lovers!

1 All the digits from 1 to 9 are used only once in the multiplication example below. Two digits have been filled in. Fill in the others and solve the equation.

? ? 3 X ? ? = ? ? ? 6

2 Fill in the grid below with four words. The answer will contain a total of four As; two each of Ds, Es, Ns and Rs; and one each of L, P, W and H.


On supporting science journalism

If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.


H A N D
A
N
D

3 There was a spelling contest at school. Rachel was neither first nor last. Rachel topped Ryan. Ann beat Jane. Charles ended up lower than Jane and higher than Rachel. Who was first?

4 The following eight letters can be arranged into a three-word phrase meaning “almost helpless.”

A C E E K P R U

5 A nine-letter word is hidden in the box below. Unscramble the letters, find the missing one, and solve the puzzle.

D S L O ? S I S E

6 Which of the following words is least like the others?

CANDLE HOPPING JEALOUS ENDING CARELESS

7 What is the five-digit number in which the first digit is the second digit squared; the third and fourth digits are the sum of the first and second; and the last digit is the sum of the second, third and fourth digits? The sum of all the digits is 21.

8 Add each line horizontally and vertically. What is the missing sum, and what are the values for each letter?

A B C D 10 A C D D 12 A C A A 6 B D B B 10 5 12 10 ?

9 Jane is now as old as John was three years ago cubed. In two years, she will be twice his current age. If you double their ages today, John will be five eighths of Jane’s age. How old are they now?

10 The same seven letters can be arranged to form two different words to fill in the sentence below.

Because of a series of _______ security alerts, the plans for the big rally were _______.

 

It’s Time to Stand Up for Science

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in that two-century history.

I’ve been a Scientific American subscriber since I was 12 years old, and it helped shape the way I look at the world. SciAm always educates and delights me, and inspires a sense of awe for our vast, beautiful universe. I hope it does that for you, too.

If you subscribe to Scientific American, you help ensure that our coverage is centered on meaningful research and discovery; that we have the resources to report on the decisions that threaten labs across the U.S.; and that we support both budding and working scientists at a time when the value of science itself too often goes unrecognized.

In return, you get essential news, captivating podcasts, brilliant infographics, can't-miss newsletters, must-watch videos, challenging games, and the science world's best writing and reporting. You can even gift someone a subscription.

There has never been a more important time for us to stand up and show why science matters. I hope you’ll support us in that mission.

Thank you,

David M. Ewalt, Editor in Chief, Scientific American

Subscribe