can you think of 10 different ways to express the number 11?

Question

my teenager has a project to think of 10 different ways to express the number 11 (like binary, braille, decimal, etc). any other ideas? (they must be written on a piece of paper) thank you!!

ah, forgot to mention, only 1 equation /expression allowed

Answer 1

binary: 1011
hexadecimal: b
octal: 13
decimal: 11
roman numerals: xi
spelled out in english: eleven
spelled out in spanish: once
(you could do various languages, but that seems cheap... 2 is plenty)
scientific notation: 1.1 x 10^1
fraction: 11/1
exponential: 11^1

Answer 2

1+1+1+1+1+1+1+1+1+1+1=11
IX Roman Numeral
eleven
once= Spanish
6+5=11
10+1=11
4+7=11
3+8+11
2+9=11
10+1=11
subtraction andwers of 11
You could show the division that gives 11 such as 55/5

Answer 3

1: 1+10
2: 2+9
3: 3+8
4: 4+7
5: 5+6
6: 22 divided by 2
7: 33 divided by 3
8: 44 divided by 4
9: 55 divided by 5
10: 66 divided by 6

Answer 4

You said some:

1. Binary
2. Braille
3. Hexadecimal
4. Sign Language (write the hand signs down)
5. Derivative of 11x
6. sqrt 121
7. Abacus
8. Roman Numeral
9. In Egyptian Hieroglyphs
10. In Spanish
................

Answer 5

what about as an equation, such as 22/2, or 8+3?

Answer 6

How about using some different operations?

Square root of 121
5+6
100-89
11/13 * 13
253/23

Answer 7

Hah - you already have loads of good ideas, oh well.
5th prime, first palindromic number (in base 10).

Best of luck - Mike

Answer 8

1011-binary

Answer 9

different numbers thatadded,subtracted, multiplied... gives u 11.