@Cas24- just seen your post today, the way I worked things out on example questions similar to exam ones are as follows:
simplify 24/60- divide both numbers by 6 as it is the highest number that goes in both, this gives answer of 4/10
40% of 240-work out 10 percent giving 24 (just take 0 out) then times 24 by 4 giving 96
Travel 40 km how many km? do 5/8 times 40, 1/8 of 40=5 so 5/8= 5 times 5=25 miles, other way Travel 60 miles how many km?do 8/5 of 60, 1/5 of 60 =12 so 8/5= 8 times 12 = 96
2 classes of 24 students and 1 class of 32, Total? Double 24=48+32=80
Student has 40 mins normally, but given 20 percent extra time, total time now? - 10% of 40 mins=4 mins double to get 20% to be 8 mins and add to 40 min giving 48 mins
any more you want there are other questions possible such as money exchange, time (teacher appointments),money questions.
You get 55 seconds from the start, After you hear the question once start your workings