Question

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 for one denomination, what is the greatest denomination of stamps she must buy to mail the three parcels?

Answer 1

Answer:

she should buy each stamp of 28 rupees

Answer 2

Answer:

4

Step-by-steyou need to take the hcf  

hcf(28,20)=

28=20×1+8

20=8×2+4

8=4×2+0

HCF of 28 and 20 is 4

Hcf (36 and 4)=4

.°. the denomination is 4 p explanation: