# MENTAL maths

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763943.  Tue Nov 30, 2010 4:56 pm

WordLover wrote:
 Vera C wrote: Yes, you're quite right. Thanks for pointing it out. I've changed it to something better. 391 = (4! x 4²) + 4 + T(4)
To correct Vera: (4! x 4²) + 4 + T(4) = 398, not 391.

391 = (4! x 4²) + Г(4) + Г(√4)

 764270.  Wed Dec 01, 2010 11:20 pm That doesn't work - that includes 4 to the power 2

764275.  Thu Dec 02, 2010 1:46 am

 Quote: Use the digit 4, up to four times to make 1,2,3 … etc Using: + , ÷ , × , - , √ , ( ) , ( )^2 and ! (as many times as necessary)

4 to the power 2 = (4)^2

764626.  Fri Dec 03, 2010 9:53 am

 Quote: Use the digit 4, up to four times to make 1,2,3 … etc Using: + , ÷ , × , - , √ , ( ) , ( )^2 and ! (as many times as necessary)

and T(), phi() and gamma(). I think that that makes the problem too easy, though it's still rather a challenge if you limit yourself to 3 4s.

392 (see above)
393 = (gamma(4)+4^4)/sqrt(:4)

where by :4 I mean .4 recurring.

 765371.  Mon Dec 06, 2010 2:36 pm 394 = (4! x 4^(√4)) + T(4)

 765472.  Tue Dec 07, 2010 3:08 am 395 = T(T(gamma(4))+gamma(4)) + T(gamma(4)) - 4

 806619.  Sat Apr 16, 2011 4:59 pm 396= (4!)(4^2)+(4^2)-4

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