importance: 3

---

# Multiply numeric properties by 2

Create a function `multiplyNumeric(obj)` that multiplies all numeric properties of `obj` by `2`.

For instance:

```js
// before the call
let menu = {
  width: 200,
  height: 300,
  title: "My menu"
};

multiplyNumeric(menu);

// after the call
menu = {
  width: 400,
  height: 600,
  title: "My menu"
};
```

Please note that `multiplyNumeric` does not need to return anything. It should modify the object in-place.

P.S. Use `typeof` to check for a number here.