x+(x+ 1)+(x+2)+...+(x+7)= 100
8x + 28 = 100
8x =72
x = 9
Of course, it may also be a cross-month situation, but this situation can not be satisfied in 8 days 100, so I won't discuss it here.
2.
There are x boys and x-2 girls.
x+(x-2)=56
2x = 58
x=29
There are 29 boys and 27 girls.
3.
Suppose they meet in x minutes.
60x+50x= 1 100
1 10x = 1 100
x= 10
So they met in 10 minutes.
The time is 8: 50.
As far as Xiao Qiang's home is concerned, Xiao Qiang has walked, and S = 60x10 = 600m.
4.
Suppose the first number is X.
x+(x+ 1)+(x+2)=36
3x+3=36
x= 1 1
These three numbers are 1 1, 12, 13 respectively.
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