Ans. The test is completely free of cost.
Ans. Anyone who wants to improve his/her aptitude skills.
Ans. The test will be online and can be taken from anywhere
Ans. No, the link for the test will only be active during the mentioned time.
Ans. The first test would contain basic question of aptitude and the difficulty level would increase in the progressive manner in the following two tests. Same would be with the other three subjects.
Ans. Since it is a practice test, you would be able to proceed to take the next test. But do not forget to work on your weaknesses.