the degrees where singapore 1n, 104e and sydney 34s, 151e. So all you do is 151- 104 divided by 15 convert to minutes and seconds and you get 2 hour something (sydney ahead)nop i got 2 hour 40 mins around there. You use the longitude (second number) in which the difference wasn't that big.
just divide the difference by 15 and change it to minutes/seconds and you got 2 hour something
"Sydney, Australia is 3 hours ahead of Singapore" - googled it so i got around that.