Question

what is least value of k such that no must be pair of nos from(1,2,3.....k)withsum equal to 9

Answer 1

Answer:

k = 4  if sum not equal to 9 for any pair

k =5  if sum equal to 9 for atleast one pair

k = 8 if sum equal to 9 for maximum pair

Step-by-step explanation:

Sum of 9

1 + 8 = 9

2 + 7 = 9

3 + 6 = 9

4 + 5 = 9

so k < 5

k = 4  if sum not equal to 9 for any pair

k =5  if sum equal to 9 for atleast one pair

k = 8 if sum equal to 9 for maximum pair