Mathematics
Write the following set in roster (Tabular) form :
A4 = {x : x is a two digit number and sum of the digits of x is 7 }
Sets
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Answer
A4 = {x : x is a two digit number and sum of the digits of x is 7}
16 ⇒ 1 + 6 = 7
25 ⇒ 2 + 5 = 7
34 ⇒ 3 + 4 = 7
43 ⇒ 4 + 3 = 7
52 ⇒ 5 + 2 = 7
61 ⇒ 6 + 1 = 7
70 ⇒ 7 + 0 = 7
A4 = {16, 25, 34, 43, 52, 61, 70}
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