Here it is, it's printing "23" when I expected "5" 

```javascript
function addNumbers(a, b) {
  var sum = a + b;
  return sum;
}

var result = addNumbers("2", "3");
console.log(result);

function checkAge(age) {
  if (age >= 18) {
    return "You are old enough to vote.";
  } else {
    return "You are not old enough to vote.";
  }
}

var age = "16";
console.log(checkAge(age));
```
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