Yes you can book the ad in all the three newspapers for all editions. For that you have to book the ad three different times for three different newspapers. You just have to visit the Times of India Education Ad Rates page to book the ad in TOI. For Hindu, please visit the Hindu Education Ad Rates page and the Hindustan Times Ad Rates Page to book the ad in Hindustan Times. Select the ad type, relevant edition and then proceed to the compose ad step.

To book for all editions, you have to refer to the discount packages section in the above mentioned links and find whether any such packages are available for all editions or not.