Comments on: Brain Game: Math Square #4

By: Emily S. S.

Emily S. S. — Wed, 18 Nov 2009 01:37:26 +0000

I love these, too. Just, please, next time check to make sure you don’t have any primes. Thanks, keep them coming!

By: RIchard Y

RIchard Y — Tue, 17 Nov 2009 22:39:14 +0000

Second guess worked. I also threw out a BOO YA! when I got it.

recaptcha has been discredited (is vapid)

By: JetaN

JetaN — Tue, 17 Nov 2009 22:02:22 +0000

BOO YA! Love these

By: brian

brian — Tue, 17 Nov 2009 21:34:57 +0000

good catches guys…dont know why i enjoy these so much but keep em coming!

By: darek

darek — Tue, 17 Nov 2009 17:38:30 +0000

Jason – you have to followed BEDMAS 2+9×5 is 47 because you do the muliplication first and then the addition. 5×9 = 45+2 = 47

By: jason

jason — Tue, 17 Nov 2009 17:09:50 +0000

2+9×5=55, not 47

By: wreck

wreck — Tue, 17 Nov 2009 17:03:12 +0000

@brian: And 4+9-1=12, not 13.

By: Nick

Nick — Tue, 17 Nov 2009 16:23:04 +0000

Took me a bit, but I got it. I like these. I kept doing the addition and subtraction before the multiplication despite your obvious instructions. The 47 and the 18 narrowed down the options pretty quick.

RECAPTCHA: Thursday cubist

By: Tim

Tim — Tue, 17 Nov 2009 16:11:57 +0000

@Brian, you can only use 2 and 4 once, so your second solution can’t work.

By: brian

brian — Tue, 17 Nov 2009 15:55:54 +0000

oops that was your solution, i meant…

7×2+4 = 18
+_+_+
2-5+3 = 0
-_x_-
4+9-1 = 13

= = =
5 47 6