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Good question mathematics
1. Suppose there are x peaches, the first one ate 1/3x, and now there are 2/3x left.

The second one ate (2/3x)*( 1/3), leaving (2/3x)*(2/3).

The third one ate (2/3x)*(2/3)*( 1/4), leaving six peaches.

Ordered: x-(1/3x)-(2/3x) * (1/3)-(2/3x) * (1/4) = 6.

Solution: x= 18

Suppose this story book has x pages. I saw 1/3x on the first day, and now there are 2/3x left.

(2/3x)* 2/5+(2/3x)x2/5+24 = x- 1/3x

Solution: x= 180

3. Solution: Let the distance of floret be x and the time of Xiao Bing be t, then the distance of Xiao Bing is 5x/4 and the time of floret is 4t/3.

The speed of Xiaohua is higher than that of Shangxiaobing (v1:v2 = x/(4t/3): 5x/4t = 3: 5).

4. The circumference of rectangle = the circumference of circle +2 radius =3. 14*2* radius+radius

So the radius is: 8. 28/(3。 14*2+2)= 1 cm

Area: 3. 14* 1* 1=3。 14 cm2

5. 180* 1+200*5+ 195*4- 1800/ 180* 10=0.0888

6. Forty percent minus twenty-five percent equals fifteen percent, twelve divided by fifteen percent equals eighty pages, and eighty times three fifths equals forty-eight pages.

7. Save two 1 year interest.

(2000*2.25%* 1+2000)*( 1-5%)=2042.75

(2042.75 * 2.25% *1+2042.75) * (1-5%) = 2084.28 * * The interest is 84.28.

Direct deposit of interest for 2 years

2000*2.7%*2*( 1-5%)+2000=2 102.6

2102.6-2084.28 =18.32 yuan

8. Original price =62÷( 1-69%)=200 yuan.

Current price =200-62= 138 yuan.

9. 12.5×( 1+2/5+ 1)÷ 15%

= 12.5× 12/5÷ 15%

=200

A: There are 200 tons in the warehouse.

10. Three-year Treasury bills

1 1. Set chicken x rabbit y.

2X+4Y= 100

2Y+4X= 140

Just solve the equation. . X=30 Y= 10

12. Suppose there are 2 cents of X coins and 5 cents of Y coins ~

So we can get two equations ~ ① 2x+26 = 5Y2x-Y = 8.

X=8+y ~ can be obtained from ②.

If ① is brought in, we can get a linear equation ~ 2(8+y)+26=5y.

Finally y= 14~ and then x=8+y=8+ 14=22 ~

So there are 22 nickels and 14 nickels ~

13. Backward, (1+1) ÷1/2 = 4 (root), (4+1) ÷1/2 =/kloc.

14. The same

So tired!