UPSKILL MATH PLUS

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1. What is the greatest possible volume of a vessel that can be used to measure exactly the volume of milk in cans (in full capacity) of 80 litres, 100 litres and 120 litres?
 
Answer:
 
Greatest possible volume = litres
 
2. The traffic lights at three different road junctions change after every 40 seconds, 60 seconds and 72 seconds respectively. If they changed simultaneously together at 8 \ a. m at the junctions, at what time will they simultaneously change together again?
 
Answer:
 
The traffic lights simultaneously change together again