Question
If 8 x 5 = 24 and 9 x 4 = 45 then 13 x 4 = ?
Solution
(8 – 5) x 8 = 24 (9 – 4) x 9 = 45 (13 – 4) x 13 = 117 (8 – 5) x 8 = 24 (9 – 4) x 9 = 45 (13 – 4) x 13 = 117
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