Question

用matlab求2到999之间同时满足下列两条件的自然数：（1）该数各位数字之和是奇数；（2）该数是素数.

Answer 1

clear;

clc;

index = 1;

for ii = 2:999;

if(mod(sum(num2str(ii)-'0'), 2) && isprime(ii))

out(index) = ii;

index = index+1;

end

end

out

结果：

3, 5, 7, 23, 29, 41, 43, 47, 61, 67, 83, 89, 113, 131, 137, 139, 151, 157, 173, 179, 191, 193, 197, 199, 223, 227, 229, 241, 263, 269, 281, 283, 311, 313, 317, 331, 337, 353, 359, 373, 379, 397, 401, 409, 421, 443, 449, 461, 463, 467, 487, 557, 571, 577, 593, 599, 601, 607, 641, 643, 647, 661, 683, 719, 733, 739, 751, 757, 773, 797, 809, 821, 823, 827, 829, 863, 881, 883, 887, 911, 919, 937, 953, 971, 977, 991, 997