Mark (/) against the correct answer in each of the follo 4. 15+5+5 2 = ? (a) 8 (b) 2 5. 16 - 2 + 7 + 6 x 2 = ? (a) 16 (b) 14 (c) 17 10) 27 6. 54 + 3 of 6 + 9 = ? (a) 117 (b) 12

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If A = {3, 6, 9, 12, 15, 18, 21}
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