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Question

P5. Is this excess shortage question? Please help. Thank you, 

Source: Ai Tong

Answer

 

Since the number range 20 to 60 is given,

we can only use the listing method.

 

Row 1,  2, 3, 4, 5, 6, 7, 8, 9, 10

L6     4, 10, 16, 22, 28, 34, 40, 46, 52, 58

L7     9, 16, 23, 30, 37, 44, 51, 58

 

There will be 10 rows  of 6 and 8 rows of 7.

Because of the inconsistent in the number of rows, we have not found other way to solve this type of question. 

 

 

 

 

1 Reply 1 Like ✔Accepted Answer

Thank you for the clarification . Now I understand why my method  can’t get to the answer. 

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My solution is as follows :

– 2 + 6 = 4, 10, 16, 22, 28, 34, 40, 46, 52, 58
+2 + 7 = 9, 16. 23, 30, 37, 44, 51, 58

Ans : 58 stamps.

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