Digital prayer mats which count the number of rakaats

Q: What is your opinion on this:

http://homeshopping.pk/products/Digital-Prayer-Mat-in-Pakistan-.html

It shows the rakats prayed on near the place of the sajdah, so the one praying can see the number of rakats he has prayed. But according to hanafi fiqh reading and understanding such as from a piece of paper during salaah is makruh? I heard in a lecture that Aisha radiAllahu anha would switch her ring from finger to finger to keep the rakaats in record. And also the qawl of Ibrahim an Nakhai that there is no harm in doing so. True?

Developing software for banks

Q: I work for a software company where we create call centre software (IVR) related products. Not all of our clients are banks, but right now, we have two clients which are banks. The call centre software is mainly used (as per my knowledge) for changing the ATM pin, complaining about lost cards, etc. The software connects the caller with the agent of the company so that the caller may explain his/her problem to the agent. Our software is not involved in the transactions of the bank in any way. Is my job permissible?

Written Talaaq

Q: My aunt got divorced on paper. But her husband says he did not intentionally give divorce to her. He divorced her under pressure of his second wife. He says he was not thinking clearly while signing papers. He also said he did say the words by mouth. Did the divorce take place or not?

In shariah is there any restriction in buying big houses?

Q: My father is a doctor and he has retired from govt job and now he got some money so we have plan to get a new house as we live in a rented house. We can accommodate in 10 marla house but we have plan to get 1 KANAL house for more luxury so according to shariah is there any restriction in buying big houses as i heard in a hadees its theme was like "Worst money is that which is spent in construction" and on another occasion our PROPHET did not liked the construction of a SAHABI and  afterwards that Sahabi demolished that construction. So can we build luxury houses to live in?

Profits stipulated in proportion to the investment

Q: I live in a non-muslim country and I am paying loans with interest. I came by an article where you can invest money and get double or triple profit after two or three months. As per the article the investment goes in real estate transactions. Is such investment permissible? If the profit is considered as riba can such money be used to repay my loan which am already paying with interest?

Doing accounting for a firm in the lottery department

Q: I work for a chartered accounting company in British Columbia, Canada. There are various departments in our company and they provide accounting services to various companies. I work as a data entry person who enters data (information about people and their addresses) and I work in the lottery department. Our company does not deal with lottery selling, we just deal with the accounting and tallying and hand over the information to the foundation or clients. My job only entails office duties and entering data which prepares the lottery for the clients. Is this job permissible for me?