Answer:
550 and 545
Explanation:
sum is the same thing as addition so the question is simply asking which of the pairs of numbers when added give a number that is more than 1000
999 + 1=1000, since the question said greater than 1000 this is not the answer because it is equal to 1000 not greater than.
801+109=910 so this isn't the answer either because it gives a number less than 1000, so we are left with;
550 and 545 which when added together gives a total of 1095 which is greater than 1000, so therefore our answer is the second option.