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Question

Question 21

Fill in the blanks to make each statement true:

Three consecutive numbers whose sum is 12 are ......................, ......................., and ........................


Solution

3, 4, 5
Let the three consecutive numbers be x, x+1 and x+2.
According to the question,
x+x+1+x+2=12
3x+3=123(x+1)=12x+1=43(x+1)3=123x+1=4x=3
Hence, the consecutive numbers are 3, 3+1 and 3+2, i.e. 3, 4 and 5.
 


Mathematics

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