Fatima wants to mail three parcels to three village schools. She finds that the postal charges are 20,28,36 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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Answer:
The greatest denomination of stamps she should buy us 4rs.
Step-by-step explanation:
So here we have to find the Highest Common Factor(H.C.F) of the postal charges.
20=2*2*5
28=2*2*7
36=2*2*3*3
So the common factor=2*2=4.
And hence 4 is the hcf of 20,28,36.
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