7
$\begingroup$

6 1 3 4 = ??

Using four basic math signs (+, -, *, /) and brackets, for instance:

6 * (1 + 3) - 4 = 20

6 * 1 * 3 + 4 = 22

6 + 13 + 4 = 23

(6 + 1)* 3 + 4 = 25

61 - 34 = 27

Try to achieve 24.

$\endgroup$
  • 1
    $\begingroup$ This question is not made by me, I heard it from a fellow train traveller years ago, so it might be a repeat. Also: No Computers You Tricky Person! $\endgroup$ – Thomas Blue Jul 27 '18 at 10:08
  • 1
    $\begingroup$ Just noticed that $61-34=43-16$... odd coincidence? $\endgroup$ – Mr Pie Jul 27 '18 at 10:08
  • 1
    $\begingroup$ Can we shuffle the digits? $\endgroup$ – LinuxBlanket Jul 27 '18 at 10:13
  • 4
    $\begingroup$ @Oray Neither the question, nor the idea of the answer corresponds that of the 2-0-1-8 question. $\endgroup$ – Thomas Blue Jul 27 '18 at 11:00
  • 4
    $\begingroup$ Possible duplicate of Make 10 out of 1, 1, 5 and 8 – it's my bonus puzzle there. $\endgroup$ – Glorfindel Jul 27 '18 at 11:34
8
$\begingroup$

One possible solution is

$24 = \frac{6}{1 - \frac{3}{4}}$

In the original notation

6/(1-(3/4)) = 24

| improve this answer | |
$\endgroup$
  • $\begingroup$ Please rewrite it with signs and brackets, as in the problem definition. Will accept as a correct answer after then. $\endgroup$ – Thomas Blue Jul 27 '18 at 10:28
  • $\begingroup$ @ThomasBlue Okay, no problem $\endgroup$ – hexomino Jul 27 '18 at 10:29
  • 2
    $\begingroup$ You got it before me. $(+1)$ :) $\endgroup$ – Mr Pie Jul 27 '18 at 10:30

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