For Mental,
1. Write the number 1-100
2. Time
e.g. At nine o'clock, which number does the short /long hand point to?
e.g. at half past ten, which number does the short/long hand point to ?
3 ...
Try to arrive much earlier at KTS and see if you can be in the interview room first. Last time, my SPCCPS (9:00am) time also crashed with GH (9:45am) and I went to SPCCPS at 8:15am and they allowed Nok lam to get inside by 8:30am and finish at 9:30am.
We then went to GH at 10:00am and still can have the interview ( though I am not sure if they will put any remarks for late arrival lor)