Hi… Welcome!!
I am also interested to know who has the highest IQ in Singapore (officially).
160 is usually considered to be genius IQ, probably like top 0.5% ?

We know that different test have different scoring criteria and bell curve, but I am curious to know if all the test are converted to 1 universal scale or just its own scale.
In other words, when we say “John has an IQ of 162” , does 162 means 162 on the universal IQ scale (if we have one), or he scores 162 on test X, and if given a different IQ test Y, he can score 145, which is the equivalent percentile of test X?