Guess and Check

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Guess and Check
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Example

• A bill of 72 was paid with 10, 5 and 1
  notes. If 13 notes were used for payments, how
  many notes of each kind were used?

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Solution
Number of 10 notes Number of 5 notes Number of 1 notes Total number of notes
7 0 2 9
6 2 2 10
5 4 2 11
3 8 2 13
Answer 3 ten-dollar notes, 8 five-dollar notes
and 2 one-dollar notes were used.
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Question 1

• A farmer had a total of 20 chickens and
  rabbits in a basket. There were 56 legs in all.
  How many chickens and how many rabbits did he
  have?

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Question 2

• Kumar paid 75 for a radio. He paid the exact
  amount in 10 notes and 5 notes. He gave the
  shopkeeper 9 notes in all. How many of them were
  10 notes and how many of them were 5 notes?

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Question 3

• Lihua bought 12 stamps from the post office.
  Some of these were 50 stamps and the rest were
  30 stamps. She paid 5.20 in all. How many 50
  stamps and how many 30 stamps did she buy?

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Question 4

• Mr Lu had 20 currency notes. Some of them were
  five-dollar notes and the rest were twenty-dollar
  notes. The total amount was 220. How many notes
  of each kind were there?

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Question 5

• Gopal has 14 coins. There are 5 ten-cent coins
  and the rest are twenty-cent coins and fifty-cent
  coins. The total value of the coins is 3.20. How
  many twenty-cent coins are there?

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The End