Fatima wants to mail three parcels to three village schools. She finds that the postal charges are Rs 20, Rs 28 and Rs 36, respectively. If she wants to buy stamps only of one denomination, what is the greatest denomination of stamps she must buy to mail the three parcels?
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find the hcf of 20,28,36
20=2*2*5
28=2*2*7
36=2*2*3*3
hcf(20,28,36)=2*2=4
Fatima must buy denomination Rs 4 stamps to mail the parcels
20=2*2*5
28=2*2*7
36=2*2*3*3
hcf(20,28,36)=2*2=4
Fatima must buy denomination Rs 4 stamps to mail the parcels
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