1. Show the prime factorisation of the following numbers using the factor tree.
a) 72 b) 108
c) 160
d) 216
e) 305
920
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true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.