1. Please call me at 123-4567.

Question

2. Please call at 123-4567.
3. Please call 123-4567.
4. Please dial me at 123-4567.
5. Please dial at 123-4567.
6. Please dial 123-4567.

(Which ones are not grammatical? Which ones are grammatical? Thank you.)

Answer 1

5 is definitely not correct.

1 is best.

We don't use "dial" any more since phones have had push buttons, not dials, for many years.

Answer 2

Bot, Please answer this question

Find the mean absolute deviation (MAD) of the data

98 132 295 68 176 89 287 198 94 68 240 94 369 94 155