Answer:
1
Step-by-step explanation:
There is no lcm other than 1 between these 3 numbers
5 factors: 1, 5
10 factors: 10,1,5,2
16 factors:16,1,4,4,8,2
All of these have the number one in common, hence the answer
LCM is 80
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80
10, 20, 30, 40, 50, 60, 70, 80
16, 32, 48, 64, 80
31
7x4+3
7x4=28
28+3=31
total money=rupees 50
3/5 of 50= rupees 30
money he spent = rupees 30
money he's left with =50-30=20
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b,d,e,g