Hi - for the boy you mentioned, as his mom is Singaporean, wondering if he is also SG citizen or PR? we are in similar situation here - our son is a HKSAR passport holder, whereas his Dad holds SG passport. i know SIS gives priority to the kids who is SG citizen or PR, but not sure whether that works in our case as my son did not take up SG citizenship.
Yes, its a 3 hrs test in English/Mandarin and Math. A friend's son who's Mum is Singaporean sat the test. He was 5 at the time, and he couldn't read yet, so we can assume he didn't do well. But he was still accepted. However, they decided that it may not be the best fit for them and opted for ESF.