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From I and II, Let the two digits of the number be x and y Now, x + y = 7 and xy = 6100 (x – y)² = (x + y)² - 4xy = 7² - 4 × 10 = 49 - 40 = 9 ∴x-y = ±3 Thus, we get x = 5 and y = 2 x = 2 and y = 5 The number could therefore be 52 (not divisible by 5) or 25(divisible by 5).
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
42 * 7 * 64 * 11 * 6 *4
((67)32 × (67)-18/ ? = (67)⁸
(750 / 15 × 15 + 152 + 20% of 125) = ?3
(180 ÷ 22 ) ÷ (60% of 30) = (? ÷ 2)
√38809 × √3249 – (91)2 = (?)2 + (50)2 – 36
[(36 × 15 ÷ 96 + 19 ÷ 8) × 38] = ?% of 608
20% of 450 - 15% of 400 = 25% of ?