1.煤球数目

代码

cnt = ans = 0
start = 1
a = []
while cnt<100:ans+=startstart += 1t = ans+startcnt+=1a.append(ans)
print(sum(a))

2.奖券数目

代码

def f(x)->bool:while x:if x%10==4:return Falsex//=10return True
ans = 0
for i in range(10000,100000):if f(i):ans+=1
print(ans)

3.网友年龄

代码

def f(x):return int(str(x)[::-1])
ans=0
for i in range(10,100):if f(i)==i-27:ans+=1
print(ans)

4.方程整数解

代码

for i in range(1,33):for j in range(i,33):for k in range(j,33):if i*i+j*j+k*k==1000 and min(i,j,k)!=6:print(min(i,j,k))

5.回家路费

代码

i = cnt =1
t = 2
while i < 108:i += tt +=2cnt+=1
print(cnt)

6. 质数

代码

def f(x)->bool:for i in range(2,x//2+1):if x%i==0:return Falsereturn True
ans=[2]
for i in range(3,20000):if f(i):ans.append(i)if len(ans)==2019:break
print(ans[-1])

7.猜年龄

代码

ans=[]
for i in range(1,30):for j in range(i,30):if i*j//(i+j)==6 and j-i<=8:ans.append(i)
print(ans[0])