2
$\begingroup$

In this grid of numbers, what is the missing number (in place of the question mark)?

$$\begin{array}{|c|c|}\hline2&7\\\hline8&9\\\hline\end{array} \begin{array}{|c|c|}\hline0&3\\\hline5&6\\\hline\end{array} \begin{array}{|c|c|}\hline0&11\\\hline10&11\\\hline\end{array} \begin{array}{|c|c|}\hline2&?\\\hline4&3\\\hline\end{array}$$

(source image in Arabic)

$\endgroup$
6
  • 1
    $\begingroup$ Does this puzzle have a source? $\endgroup$
    – user20
    Commented Jan 23, 2015 at 16:21
  • 1
    $\begingroup$ Does this puzzle work with the standard arabic numbers? $\endgroup$
    – Gamow
    Commented Jan 23, 2015 at 16:23
  • $\begingroup$ doesnt different form of the numbers (arabic or english). i now edited the pictures $\endgroup$
    – Arash
    Commented Jan 23, 2015 at 16:28
  • $\begingroup$ I don't see any difference between the old and the new picture. $\endgroup$
    – March Ho
    Commented Jan 23, 2015 at 16:30
  • $\begingroup$ Assuming the numbers map to this image , the 4 matrices are (2,7,8,9), (0,3,5,6), (0, 11, 10, 11), (2, ?, 4, 3) $\endgroup$
    – March Ho
    Commented Jan 23, 2015 at 16:34

2 Answers 2

11
$\begingroup$

The missing number is

1.

because

You can interpret the two numbers on the top of each grid as a single decimal number, but with the ones digit written first, e.g. "2 7" becomes 72. This top number is then the product of the two numbers below. So 72 = 8*9, 30 = 5*6, 110 = 10*11, and 12 = 3*4.

$\endgroup$
1
$\begingroup$

This can be viewed as three equations with 3 unknowns.

$$2A+0B+0C=2$$ $$8A+5B+10C=4$$ $$9A+6B+11C=3$$ $$7A+3B+11C=?$$

$$? = \frac{53}{5}$$

I don't believe this is the intended answer but it is valid.

Alternatively:

$$2A+8B+9C=7$$ $$0A+5B+6C=3$$ $$0A+10B+11C=11$$ $$2A+4B+3C=?$$

$$?=10.6$$

$\endgroup$
1
  • $\begingroup$ oh bro, i think it must be from Natural number . $\endgroup$
    – Arash
    Commented Jan 23, 2015 at 21:52

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.