+118673
you can use some or all thes numbers but you cannot use any of them twice.
the operations are multiply, division, addition and subtraction (and brackets if you want)
The aim is to get as close as possible to the target number.
1) 4, 6, 25, 50, 75, 100 The target number is 821
2) 2, 8, 25, 50, 75 and 100 The target number is 431 (I think this one may be very difficult)
I'll post the answers after you have had a go. 
+394 (75 + 50) * 6 + 100 - 25 - 4 = 821
75 * (50 - 6) / 4 - 100 / 25 = 821
(100 + 50 - 25) * 6 + 75 - 4 = 821
(100 - 75) * (25 + 6) + 50 - 4 = 821
(100 + 6 - 75) * 25 + 50 - 4 = 821
100 * (50 + 6) * 4 / 25 - 75 = 821
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(75 * 50 - 100 - 2) / 8 - 25 = 431
(75 * (50 - 100 / 25) - 2) / 8 = 431
_7UP_
+118673 That is pretty close Will85237.
If you decide you want the 'exact' answer, send me a private message and I will send it to you :)
+394 (75 + 50) * 6 + 100 - 25 - 4 = 821
75 * (50 - 6) / 4 - 100 / 25 = 821
(100 + 50 - 25) * 6 + 75 - 4 = 821
(100 - 75) * (25 + 6) + 50 - 4 = 821
(100 + 6 - 75) * 25 + 50 - 4 = 821
100 * (50 + 6) * 4 / 25 - 75 = 821
----------------------------------------------------
(75 * 50 - 100 - 2) / 8 - 25 = 431
(75 * (50 - 100 / 25) - 2) / 8 = 431
_7UP_
+118673 
