1
$\begingroup$

The 4 quadruples are complete, however the 5:th one is not. Replace the question mark. (All 5 quadruples follow the same rule)

enter image description here

$\endgroup$

1 Answer 1

5
$\begingroup$

50 ? Seems that third and fourth digit are multiples of first and second digit with common factor.

$\endgroup$
1
  • $\begingroup$ This is the intended answer. I thought of it like this though: ad = bc. But since your reasoning obviously leads to the same answer, im giving you the tick :) $\endgroup$ Feb 11, 2020 at 14:51

Your Answer

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

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