이경수 선생님의 수학실험실

Problem 11(Largest product in a grid)In the 20×20 grid below, four numbers along a diagonal line have been marked in red.08 02 22 97 38 15 00 40 00 75 04 05 07 78 52 12 50 77 91 08 49 49 99 40 17 81 18 57 60 87 17 40 98 43 69 48 04 56 62 00 81 49 31 73 55 79 14 29 93 71 40 67 53 88 30 03 49 13 36 65 52 70 95 23 04 60 11 42 69 24 68 56 01 32 56 71 37 02 36 91 22 31 16 71 51 67 63 89 41 92 36 54 2..

Problem 1(Multiples of 3 and 5) If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. In Python: sum=0 for i in range(1,1000): if i%3==0 or i%5==0: sum+=i print(sum) Run time: 0.00024700164794921875 seconds In Python:print(sum([i for i in range(1, 1000) if i % 3 == ..