Twelve. Four squared is sixteen less four is twelve.
43 times.
three fourths of sixteen is twelve.3/4 of 16 is 12
Twelve less than sixteen is four.
12+(16/x)
Three
Twelve and sixteen hundredths (12.16) in standard form is 1.216 × 101
probably 13 14 or 15
1, 2 and 4.
There is no "most common" multiple of two or more numbers, but there is a greatest common multiple if that's what you mean. But for multiples, the list of common ones goes on and on and on, since every single number in the universe is a multiple.
1/4
4(x + 12) ≤ 16