Legal notice

This is a courtesy translation. The Spanish version is the authoritative one and prevails in case of any discrepancy.

Site owner

In compliance with article 10 of Spanish Law 34/2002 on information society services and electronic commerce (LSSI-CE), the details of the owner of this website are:

• Owner: Juan Carlos del Río
• Tax number (NIF): 46556019V
• Address: Bulevar del Manzanares 2. 28701. San Sebastián de los Reyes. Madrid (Spain)
• Contact email: hola@porqueasi.com
• Website: https://porqueasi.com

Purpose

Por qué así offers animated, narrated lessons that explain exam problems. Every published lesson is free to access and no sign-up is required. A paid service is planned: preparing lessons for new problems on request, paid for with prepaid credit; the planned method for topping up that credit is PayPal, with top-ups of €5, €10, €20, €50, €100 (VAT included). Credit does not expire. Unspent credit is refunded in full, with no fees deducted, to anyone who asks for it within 180 days of the top-up; the refund is made within 3 days. Planned delivery times: standard, within 3 calendar days; priority 24 h, within 24 hours (price ×2); priority 8 h, within 8 hours (price ×3). That service is not open yet, and today no product or service is sold and no payment is accepted through the site.

Exam questions and their source

The problems come from official Spanish university entrance exams (PAU), set by the universities and organising committees of each autonomous community, who are their authors. They are reproduced, translated into English, with their source (community, academic year, session, subject and question number) for the sole purpose of explaining and discussing them for teaching. Por qué así has no connection with those universities or with the education authorities, and the explanations are not official solutions and do not replace the published marking criteria.

If you hold rights over a question and consider that its use is not appropriate, write to hola@porqueasi.com and it will be reviewed or removed.

Intellectual property of the lessons

The explanations, scripts, animations, design and code of the lessons are the work of the site owner. They may not be reproduced, distributed or communicated to the public for commercial purposes without permission. Linking to the lessons and using them in class is allowed.

Synthetic voices

The voices in the lessons («Lucy» and «Dan» in English, «Lucía» and «Dani» in Spanish) are synthetic voices generated by computer from a written script. They do not belong to real people.

Accuracy of the content

The lessons are reviewed carefully, but they may contain mistakes. They are offered as study support, with no guarantee of results in any exam. If you find a mistake, please report it to hola@porqueasi.com.

Applicable law

This legal notice is governed by Spanish law.

Last updated: 14 November 2026.