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Question

How Many Stamps?

• Rahul needs stamps of Rupees 25 for his parcel. He went to the post office. Only stamps of Re 1, Rs 2, Rs 5 and Rs 10 were there at that time. Using those stamps in how many different ways can he make Rs 25?

• Can you show five different ways? What is the heaviest parcel he can send using stamps of Rs 25?

• Rahul needs stamps of Rupees 25 for his parcel. He went to the post office. Only stamps of Re 1, Rs 2, Rs 5 and Rs 10 were there at that time. Using those stamps in how many different ways can he make Rs 25?

• Can you show five different ways? What is the heaviest parcel he can send using stamps of Rs 25?

Open in App

Solution

The 5 different ways are given below:

(1)

Rahul can buy five stamps of Rs 5 each in order to buy stamps of Rs 25 for his parcel.

Cost of 1 stamp = Rs 5

Cost of 5 stamps = Rs 5 × 5

= Rs 25

(2)

Rahul can buy two stamps of Rs 10 each and one stamp of Rs 5 in order to buy stamps of Rs 25 for his parcel.

Cost of two stamps of Rs 10 each = Rs 10 × 2

= Rs 20

Total cost of two stamps of Rs 10 each and one stamp of Rs 5 = Rs 20 + Rs 5

= Rs 25

(3)

Rahul can buy ten stamps of Rs 2 each and one stamp of Rs 5 in order to buy stamps of Rs 25 for his parcel.

Cost of ten stamps of Rs 2 each = Rs 2 × 10

= Rs 20

Total cost of ten stamps of Rs 2 each and one stamp of Rs 5 = Rs 20 + Rs 5

= Rs 25

(4)

Rahul can buy three stamps of Rs 5 each and five stamps of Rs 2 each in order to buy stamps of Rs 25 for his parcel.

Cost of three stamps of Rs 5 each = Rs 5 × 3

= Rs 15

Cost of five stamps of Rs 2 each = Rs 2 × 5

= Rs 10

Total cost of three stamps of Rs 5 each and five stamps of Rs 2 each = Rs 15 + Rs 10

= Rs 25

(5)

Rahul can buy three stamps of Rs 5 each and one stamp of Rs 10 in order to buy stamps of Rs 25 for his parcel.

Cost of three stamps of Rs 5 each = Rs 5 × 3

= Rs 15

Total cost of three stamps of Rs 5 each and one stamp of Rs 10 = Rs 15 + Rs 10

= Rs 25

(1)

Rahul can buy five stamps of Rs 5 each in order to buy stamps of Rs 25 for his parcel.

Cost of 1 stamp = Rs 5

Cost of 5 stamps = Rs 5 × 5

= Rs 25

(2)

Rahul can buy two stamps of Rs 10 each and one stamp of Rs 5 in order to buy stamps of Rs 25 for his parcel.

Cost of two stamps of Rs 10 each = Rs 10 × 2

= Rs 20

Total cost of two stamps of Rs 10 each and one stamp of Rs 5 = Rs 20 + Rs 5

= Rs 25

(3)

Rahul can buy ten stamps of Rs 2 each and one stamp of Rs 5 in order to buy stamps of Rs 25 for his parcel.

Cost of ten stamps of Rs 2 each = Rs 2 × 10

= Rs 20

Total cost of ten stamps of Rs 2 each and one stamp of Rs 5 = Rs 20 + Rs 5

= Rs 25

(4)

Rahul can buy three stamps of Rs 5 each and five stamps of Rs 2 each in order to buy stamps of Rs 25 for his parcel.

Cost of three stamps of Rs 5 each = Rs 5 × 3

= Rs 15

Cost of five stamps of Rs 2 each = Rs 2 × 5

= Rs 10

Total cost of three stamps of Rs 5 each and five stamps of Rs 2 each = Rs 15 + Rs 10

= Rs 25

(5)

Rahul can buy three stamps of Rs 5 each and one stamp of Rs 10 in order to buy stamps of Rs 25 for his parcel.

Cost of three stamps of Rs 5 each = Rs 5 × 3

= Rs 15

Total cost of three stamps of Rs 5 each and one stamp of Rs 10 = Rs 15 + Rs 10

= Rs 25

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