Ten-day training math answers

1. the date of the trip is set at X.

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.

There are x boys and x-2 girls.

x+(x-2)=56

2x = 58

x=29

There are 29 boys and 27 girls.

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.

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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