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Let the number of boys be 5x and the number of girls be 3x. After joining, the boys = 5x + 15 and girls = 3x + 5. New ratio: (5x + 15) / (3x + 5) = 9/5 Cross-multiplying gives: 5(5x + 15) = 9(3x + 5) 25x + 75 = 27x + 45 2x = 30 x = 15 Initial number of boys = 5x = 75
What will be the geometric mean of 'Q' and 'P - Q'.
75, 80, 95, ?, 155, 200
8 13 36 123 ? 2585
45, 59, 31, ?, 17, 87
10, ?, 50, 100, 250, 500
5, 19, 30, 43, 58, ?
13 19 32 52 ? 113
What will come in the place of questions (?) mark in the following questions.
1279, 1265, ? , 1225, 1193, 1149
Find the missing character.
124, 147, 176, 207, 244, ?