That's not a binary number ! Binary numbers can only use the digits 1 and 0.
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The number that, when multiplied by 3, equals 121 is 40.3333... (repeating). This can be calculated by dividing 121 by 3, which equals 40.3333... The exact result is a non-terminating, non-repeating decimal, but it can be approximated as 40.33 when rounded to two decimal places.
The square root of 121 is the number which multiplied by itself will give 121, the answer is 11. (11*11=121). we write 11*11 as 112 thus if 112 = 121, then the square root of 121 or √121= 11 as you can see a square root of a number is the opposite of the square of a number
The 11th square number is 11*11 = 121
1, 11, 121.
√121 = 11 → 11 × 11 = 121 Also: -11 × -11 = 121