Four Fours

16 ??? we haven't got that far yet.

and 4x4 = 16 does not use four fours.

I couldn't read all the OP , my head started hurting and my eyes crossing

I could recite the whole 4x table though!

LOL, my brain has not worked this hard for ages, I love number problems.

I'm with phoenix

16=4+4+4+4.

Grumpa, hold your horses, we still need 13, 14 and 15

I have lost the will to live reading through all of those posts. I am afraid that I can only manage up to the 12 x table and zilch else. Like phoenix I prefer words.

I was better at languages and English at school rather than physics, chemistry and maths- which was 100 years ago.

13 =(4*4)-4+3

No it doesn't. Don't!

Sorry, still don't fully understand the rules about 'squaring', 'powers' etc ! I think this will probably not be allowed but hey ho worth a try!

13 = (4squared - 4) + 4/4

15 = 4x4 - 4/4

14 = 4/.4 + sqrt 4 + sqrt 4

16 = (4/.4) + (4 + sqrt4)

Try again
17= (4x4) + (4/4)

4 squared is not acceptable as it would be written with a superscript 2 - see earlier posts

13 = (44/4) + sqrt4

18 = 4! - 4 -sqrt4

19=4!-4+(4/4)
20=4x4+sqrt(4x4)

OK, thanks! Read all earlier posts but seemed conflicting... hence my hesitation with my formula for '13'!

21 = (4! - 4) + 4/4

Alygran. I think that your 19 = 21?
I think you mean 4! - 4 - 4/4

You're beginning to get the hang of it now.

22= 4!-(4+4)/4

rosequartz I see what you mean now, I thought you meant you had looked at the post above and come up with 16 instead of 10.

"LOL, my brain has not worked this hard for ages, I love number problems."

Must be an engineer thing. Wait till you get to 89, it took me !#@*ing hours!

23 = 4! - √4 + 4/4

Thanks soontobe I typed it in wrong! Hopefully a bit better this morning. I think this one is ok...
24= (4x4)+4+4

26 = 4! + sqrt4 - sqrt4 + sqrt4

I cant do 25.

25 = 4! - (4/4) + sqrt4