2. Today, Pusheng is three feet long a day; Wan was born one day and grew a foot. Pu's birthday is his own, and Wan's birthday is doubled. What is geometry? the nine chapters on the mathamatical art
3, a chicken Weng, worth five, a chicken mother, worth three, a chicken chick, worth one or one hundred dollars to buy a hundred chickens, ask the geometry of the chicken Weng mother chick? Zhang Qiujian suan chicken
4. "Algorithm unification": A drives the sheep to chase the grassland, and B pulls a fat sheep to follow; Opera a and a hundred? Jia Yun said that there is no difference. If we put such a group together and add a small group, we will get together one by one. Who can guess the mystery?
5. Looking at the towering seventh floor from a distance, the red light is doubly red; * * * 38 1 lamps, how many lamps are there on each floor (ask how many lamps are there on the spire)? Algorithm unification
1. Let the number of people x and the price of chicken y, then,
9X- 1 1=Y, 6X+ 16=Y, the number of winners is 9, and the chicken price is 70.
2. Let the heights of X days be equal, then,
3( 1+ 1/2)^X=2^X
X = 1/(log base 3 4 logarithm-1).
3. I wonder how many hundred dollars are in "Hundred Money for Hundred Chickens"? If it is 100, there is no need to do it because if you want to buy 100 chickens, you have to buy 100 chickens. Obviously, if it wasn't 100, you wouldn't know.
4.( 100— 1)÷( 1+ 1+2/ 1+4/ 1)
=99÷ 1 1/4
=99×4/ 1 1
= 36 (only).
5. The total number of lights is the number of lights on the top floor:
1+2+4+8+16+32+64 =127 times, so 38 1 ÷ 127 = 3 (lamp).