what is 7! or 7 factorial?
460125
it's 1 X 2 X 3 X 4 X 5 X 6 X 7 = 5040\n\nEDIT: Guess I was a bit slow here. Anyway, if you open your windows calculator. Click 'view' and pick 'scientific' you will see a much more complicated calculator.\n\nAmongst all the buttons is on that says N! (4th button for left on next to last row). That is the factorial button. Just hit '7' then the N! button for your answer.
999954
1!=1\n2!=2\n3!=6\n4!=24\n5!=120\n>5!=some number ending in zero, since everything would be a multiple of 5!, and 5! is a multiple of 10.\nThus your answer is 1+2+6+4 mod 10 or being simplified, 3.
804536
1 + 7 + 7(6) + 42(5) + 210(4) + 840(3) + 2520(2) + 5040(1) = 13,700
133233
(1+1+1)! = 6 3 factorial is 6\n2+2+2 = 6\n3*3-3 = 6\nsquare root(4) + square root(4) + square root (4) = 6\n5 + 5/5 = 6\n6+6-6 = 6\n7 - 7/7 = 6\ncube root(8) + cube root(8) + cube root (8) = 6\n9+9 / square root(9) = 6
621145
With just ! (Factorial), +, -, * and /, it is impossible to get 150 using only 3 5s without the x^2 (Squared) operation (Which means x*x, in case you are in Fifth Grade), or using a '^2' as you say. If you say there is an alternate way, and there really is, then I give up and admit defeat. (I'm sure most others do.) If you are so sure, why don't you post the answer yourself?
222065
nCr = n!/(n - r)!r!\n\nWhere\nx! = x(x - 1)(x - 2)(x - 3)... 1\nExample\n7! = 7*6*5*4*3*2*1 = 5040\nx! reads "x factorial"\n\nso,\n5C4 = 5!/(5 - 4)!4!\n= 5*4*3*2*1 / [1!(4*3*2*1)]\n= 120/1(24)\n= 120/24\n= 5
563831
4! + 4! + 4/4 =49\n\n4!= factorial(4) =24
129968
72 = 70 + 2\nwhen we cancel 7 to 6 this mean 70 = 60 + 10\nthis 10 when you add to 2 make 12\n72 = 60 + 12\n48 = 40 + 8\n72-48 = 20 + 4\n72 - 48 =24
901509
2, i think....8*6 = 48\n9*7 = 63\n7*2+1 = 15\n9*3+1 = 28
503153
(x+7)(x+3)\n(x-11)(x+2)\nforget this one.  its AC factoring though\nthis ones AC too
1099830
27\n\n(+7 -4 +8 -3 +9 -2 +10)
951171
Add them... 8+7+7+5+3+2+2= 34 and divided by 7\nYyou have 34/7=\nYou know 4x7= 28 so you need 6 more to reach 34\nso you have 4 and 6/7
1157090
It's the symbol for factorial.  It means multiply the number n by n-1, then by n-2, etc. until you get to 1, e.g., 5! = 5*4*3*2*1.  Also, 0! is defined as 1.
954164
grab a calculator and try 1.1 x = = = = =  until you get a number >2.\nthe first time you hit = is ^2, next is ^3 etc.  count.\n\nN=7
54835
Seven is the correct answer. I'm not sure what kind of source you're looking for, but I've found it in multiple sources.
609300
This is more of a word problem or a riddle than a math problem.\n\nThe answer is 7 (SEVEN).  Remove its first letter and it becomes EVEN!
926657
(3 a^-7 b^7) / (9 a^7 b^-5) = ((3)(1/a^7)(b^7)) / ((9)(a^7)(1/b^5)) =\n\n((3 b^7) / a^7) / ((9 a^7) / b^5) = ((3 b^7) / a^7) times (b^5 / (9 a^7))\n\n= (b^12) / (3 a^14)    OR    3^-1 a^-14 b^12