Question
If 25 @ 20 = 5 and 28 @ 23 = 14, then 26 @ 21 = ?'. What
will come in place of question mark?Solution
25 x 20 = 500; 5 + 0 + 0 = 5 28 x 23 = 644; 6 + 4 + 4 = 14 26 x 21 = 546; 5 + 4 + 6 = 15
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