Which sets of numbers are closed under addition?
Choose all answers that are correct.
A. {0, 2, 5, 8}
B. even integers
C. rational numbers
D. {0}

Question

Which sets of numbers are closed under addition?
Choose all answers that are correct.
  A. {0, 2, 5, 8}
  B. even integers
  C. rational numbers
  D. {0}

anonymous · Answer

@Haseeb96 @just_one_last_goodbye

haseeb96 · Answer

when we add any two number taken from choice A that is  { 0 , 2,5,8} 
first we take 0 and any number like i take 5
0 + 5 =5

haseeb96 · Answer

here 5 is also present in above set 
but when we add two numbers like 2 and 5 
2+5 = 7
the 7 is not present in this set { 0,2,5,8} 
so it doesn't close under Addiction

haseeb96 · Answer

got it ?

anonymous · Answer

so its a and b ?

haseeb96 · Answer

no A choice does not  closed under addition 
but B,C and D are closed under addition

anonymous · Answer

okay thanks