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प्रश्न
Rahul needs stamps of Rupees 25 for his parcel. He went to the post office. Only stamps of Rs 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?
उत्तर
The 5 different ways are given below:
-
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
- 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
- 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 - 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
- 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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संबंधित प्रश्न
Father gave them some idea of the weight of each thing.
| Thing loaded | Weight |
| A sack of wheat | 100 kg |
| A sack of rice | 35 kg |
| Water tank | 50 kg |
| Almirah | 70 kg |
| A table | 10 kg |
| A chair | 5 kg |
| A mattress | 20 kg |
| Bamboo ladder | 10 kg |
| Pots and pans | 10 kg |
Find out the total weight they had loaded on the cart.
If you put the soap and the weight you just made together in a pan, how many grams will both these weigh?
Use your weights to weigh different things and write in your notebook.
Which pan of the balance will go down? Show by drawing an arrow.
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Name 5 things that we usually buy -
| In Grams | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 |
| In Kilograms | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| 5 |
Now imagine what happened next and complete the story. Discuss with your friends how Vaidika’s daughter found the weight of the elephant.
Now you show how Abdu will use these stone pieces to weigh —
4 kg of firewood -
How much does a postcard cost?
A frog was struggling to escape from the mouth of a crow. How can I escape? The frog thought. Suddenly a trick came to his mind. He asked the crow-Are you good at arithmetic? If yes, then I will ask you a problem.
Your weight is 650 g and I am only 145 g. How much do we weigh together? The crow was good at mathematics, so he happily opened his beak to answer.
What happened after that? So what was the answer the crow wanted to give?
All oranges have equal weight. The two papayas have the same weight. The weights in the first and second balances are equal.
How many oranges balance the weight in the third?
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