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}

Answer 1

@Haseeb96 @just_one_last_goodbye

Answer 2

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

Answer 3

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

Answer 4

got it ?

Answer 5

so its a and b ?

Answer 6

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

Answer 7

okay thanks