Often, the problem is a simple typographical error that is easy to spot and correct. After correcting the error, submit your answer again.
Errors Specific to Numerical Questions
The following errors are common in questions that require you to enter a number with or without a unit.
Problem | Incorrect | Correct |
|---|---|---|
Misspelled unit. | 3456 met/sec | 3456 m/s |
Specifying a unit when none is required. | 3 m | 3 |
Numerical answers cannot contain variables. | 2*x+3 | 2*10+3 |
Numerical answers cannot use implicit multiplication. | 3(14) | 3*14 |
Numerical answers must use ** to specify exponents. | 2^3 | 2**3 |
Common Errors
Some of the most common errors are listed here.
Problem | Incorrect | Correct |
|---|---|---|
Unrecognized symbol. | $4.00 4&6 | 4.00 4+6 |
Brackets or braces instead of parentheses. | 4*{x+3} | 4*(x+3) |
Unpaired parentheses. | (1+2)+3) | ((1+2)+3) |
Missing part of the expression. | 50* | 50*3 |
Too many consecutive operators. | x++++2 | x+2 |