Math Fun Questions Nash Equilibrium Theory .

In the middle, no matter where the other party is, they have an advantage.

4 (weeks) + 9 (weeks) = 1 (quarter).

Explanation: Since there are 52 weeks in a year, 52 4 = 13, so 4 weeks + 9 weeks = 13 weeks = 1 quarter.

35x/30+35x/40=2x+2

7x/6+7x/8=2x+2

28x+21x=48x+48

x = 48 cost a total of 48 * 70 = 3360 cents = dollars.

Solution: After turning 6 cards, it is the X number, then, the other days are in order; x-1；x-2；x-3；x-4；x-5；

x+x-1+x-2+x-3+x-4+x-5=75；

6x-15=75solution, x=16;Therefore, it is the number

The date of this day is X.

x-1)+(x-2)+(x-3)+(x-4)+(x-5)+(x-6)=75

6x-21=75

6x=96x=16

The date of this day is the 16th.

If today is X, then the first six days are X-1, X-2, X-3, X-4, X-5, and X-6, then the total of these six days should be 75. And the equation comes out:

6x-（1+2+3+4+5+6）=75

x=96/6=16

So it should be the 16th.

After a nine-percent discount, each ** is 2 * yuan, and the profit is yuan.

After the discount, the profit of 20 is 20* yuan.

It turned out that the profit of each handful was yuan, the total profit = 86-6 = 80 yuan, and the number of sold pieces was 80 yuan, and a total of 20 + 160 = 180 pieces were bought.

The last 20 make 2*(

A total of 180 brooms were bought.

It's so simple, the last 20 make a lot of money each, a total of 6 bucks.

So the front earned a total of 80 yuan.

And the front earns each hand, so there are a total of 160 in the front.

So there are a total of 180 brooms.

Set up a total of x brooms;

The profit is: (x-20)*(

Solution: x=

One hundred and eighty In total, the number of words is not enough.

It's as simple as buying a total of x, and you can find the equivalence relation: (multiply by (x-20) + multiply by (multiply by 20=86;i.e., x=174

So, he bought a total of 174 brooms.

The top four are 3, 13, 9, 2, the middle five are 5, 4, 1, 6, 11, and the bottom four are 12, 8, 10, 7