4! - 44/4 = 24 - 11 = 13
44 / 4 + root(4) is one solution. You can find additional solutions in the Wikipedia article "Four fours".
Only if you subtract three.
There are four 4's in a standard deck of cards.
11 = 4/.4 +4/4 13 =( 4! radical( 4) + 4 )/4 13 = 4/,4/ + radical(4) + radical(4)
1x36, 2x13, 4x9, 20+13. That's a few of them.
44 / 4 + root(4) is one solution. You can find additional solutions in the Wikipedia article "Four fours".
13
Only if you subtract three.
There are four 4's in a standard deck of cards.
Three fours and one half of 4 Or if you mean using only fours and operation signs you develop methods like this: 42 - 4 + (4/4) = 13. In words, four squared (16) take 4 (12), + the sum of 4/4, which is one (13). Obviously, being an prime number, 13 doesn't fit equally into four, so use a combination of different mathematical symbols to change four into many other numbers: 42 = 16 Square Root of four = 2 4! (four factorial) = 24 43 = 64 4/4 = 1 4 + 4 = 8 Combinations of these can be used to make the 13 you're after.
Quartets and quadruplets are groups of four. Tires and wheels for cars come in fours. There are four suits in a pack of playing cards. Table and chair legs come in fours. Energy drinks often come in four-packs.
(33 + 3!) / 3 = (33 + 6) / 3 = 39 / 3 = 13.
11 = 4/.4 +4/4 13 =( 4! radical( 4) + 4 )/4 13 = 4/,4/ + radical(4) + radical(4)
(.5x5)x5+.5=13
1x36, 2x13, 4x9, 20+13. That's a few of them.
(22/2) + 2 = 11 + 2 = 13
You don't say how many 6s I'm allowed to use, but here it is with four of them: 6 ÷ 6 + 6 + 6 = 13