A math problem for people with high IQs

Solution: Let the boys be x and the girls be 48-x.

x =48-x+15

x = 18

then 48-x+15=45

So people. A: At this time, there were 90 boys and girls on the playground.

There are x boys and y girls.

x y=48, so y=48-x

x substitutes.

x=18y=48-18=30

So there are 18 boys and 30 girls.

Let the boy be x so the girl is (48-x), get the equation, solve x that is, there are 18 boys, and then substitute x=18 into 48-x to get 30 girls (casually say that the world is really hot and cold now, even the question knows that there are more girls now, and there are fewer boys, hey, the current girls can't afford to mess with it!) ）

If there are x boys and y girls, then x+y=48--- the number of boys on the playground is doubled", then the number of boys on the playground is x+ the number of girls is y+15x+ =y+15---

Simultaneous equations, solved: x=18 y=30

a:25=8+8+6+3

a=1+3+4+9=17

b: 2803 There are three circles in these four numbers.

3680 6 a circle 8 upper and lower two circles 0 a circle so = 4 so 2900 = 3 8888 = 8

b=24

Question 1: The inverted triangle 88-63-25 refers to 8+8+6+3=25, and the same is true for others.

So a=1+3+4+9=17At the same time, it can be verified that 1+7+1+0=9 can be verified.

Question 2: Right of the equal sign = the number of 0 (circles) among the 4 numbers to the left of the equal sign.

So 2900 = 3, 8888 = 8, b = 3 * 8 = 24

So in the same way, a is obtained by the sum of the digits in each digit of 13 and 49. i.e. a=+3+4+9=17Question 2:

Rule: There are two "zeros" in the number 8, while'0,6,9"There is one'0", the number to the left of the equal sign'0"Number = number to the right of the equal sign.

There are 2900 out of 3'0",8888 has 8 "0s", so 2900=3,8888=8,b=3 8=24 hope this summary will help you! But then again, that's not a very good question! Good luck with your studies!

(1)8+8+6+3=25

So it's 172) an 8 has 2 and 1 each"0", nothing else"0"

There are 2900 out of 3"0", 8888 of 8"0", so 3*8=24

25=8 8 6 3

a=1 3 4 9=17

There are 2 of 8s and 1 of each"0", nothing else"0"

There are 2900 out of 3"0", 8888 of 8"0", so 3*8=24

The answer is 542b

986f、875e、764d、653c、-542b
a

Reason: Because the first digit of each group of numbers starts to decrease from 9, the second digit starts to decrease from 8, the third digit is 2 than the first digit, and the fourth digit starts from the letter f and goes forward.

542b

The first digit decreases from 9, 9, 8, 7, 6, "5", 4, the second digit decreases from 8, 8, 7, 6, 5, "4", 3, the third digit decreases from 6, 6, 5, 4, 3, "2", 1, the last left digit increases alphabetically from the last one. f, e, d, c, "b", and a are [542b].

3 square equals 6 circles, then 1 square equals 2 circles.

2 circles equals 4 stars, then 1 circle equals 2 stars.

2 stars + 2 stars + 4 stars equals 320

8 stars equals 320

Then the star is equal to 40

A circle is equal to 80 and a square is equal to 160

Because 3 boxes = 6 circles, 1 box = 2 circles.

Because 2 circles = 4 stars, 1 circle = 2 stars.

2 stars + 1 circle + 1 box = 320

2 stars + 2 stars + 4 stars = 320

8 stars = 320

So: 1 star = 40

1 lap = 80

1 box = 160

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