Given the following diagram, what are the missing two numbers in the last figure?

This is from a mathematics book for primary school

enter image description here

  • $\begingroup$ Has a correct answer been given? If so, please don't forget to $\color{green}{\checkmark \small\text{Accept}}$ it :) $\endgroup$
    – Rubio
    Jan 27, 2023 at 15:59

1 Answer 1


In each given circle, the middle number equals

(A - B) * (C / D)


all four outer numbers A B C D are from 1 to 9 inclusive, and A and B are adjacent.

The last circle fits this pattern if

the right number is 9 and the bottom number is 1.

  • 1
    $\begingroup$ Why not 1 and 1? Wouldn't this also work? $\endgroup$
    – hexomino
    Jan 25, 2023 at 16:54
  • $\begingroup$ @hexomino rot13(Lrf, jul abg? Jryy, lbh pbhyq nqq gur nqqvgvbany erfgevpgvba gung N unf gb or ynetre bg rdhny gb P.) $\endgroup$
    – theozh
    Jan 25, 2023 at 18:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.