Xiao Ming, his father and his mother are playing on the seesaw. Their weight is 150kg. His father is sitting on one end of the seesaw. Xiao Ming, who weighs only half of his mother, is sitting on the other end of the seesaw with his mother. At this time, his father's end is still on the ground. Can you guess what range Xiao Ming's weight should be?

Xiao Ming, his father and his mother are playing on the seesaw. Their weight is 150kg. His father is sitting on one end of the seesaw. Xiao Ming, who weighs only half of his mother, is sitting on the other end of the seesaw with his mother. At this time, his father's end is still on the ground. Can you guess what range Xiao Ming's weight should be?

Suppose Xiao Ming's weight is XKG, then his mother's weight is 2xkg. According to the meaning of the question, we can get x + 2x < 1502, and the solution is x < 25

Xiao Ming, his father and his mother are playing on the seesaw. Their weight is 150kg. His father is sitting on one end of the seesaw. Xiao Ming, who weighs only half of his mother, is sitting on the other end of the seesaw with his mother. At this time, his father's end is still on the ground. Can you guess what range Xiao Ming's weight should be?

Suppose Xiao Ming's weight is XKG, then his mother's weight is 2xkg. According to the meaning of the question, we can get x + 2x < 1502, and the solution is x < 25

Xiao Fang and her parents play on the seesaw together. They weigh 150 kg, and her father makes one end of the seesaw. Xiao Fang, who weighs only half of her mother's, sits on the seesaw with her mother. How many kg does Xiao Fang weigh when her father lands on the ground,

Because it's on both sides of the seesaw and it's balanced
So the left is equal to the right 150 / 2 = 75 (kg)
Set: the weight of mother is x, then the weight of small square is 1 / 2x
So x + 1 / 2x = 75
3/2X=75
X=75X2/3
X=50
So small square weight 50 / 2 = 25 kg
Mother weighs 50kg, father weighs 75kg