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Total age of 20 girls = 20 × 15 = 300 years Total age of 25 girls = 300 + (5 × 10) = 300 + 50 = 350 years Therefore new average age = 350/25 = 14 years
16, 8, 8, 12, ?, 60
7 12 33 ? 635 3804
...140, 146, 170, 224, ?, 470
37, 57, 82, ?, 147, 187
84, 63, ?, 283.5, 1701
Find the missing character.
12, 25, 51, ?, 207, 415
28, 43, 73, 118, ?, 253
Which of the following number will replace the question mark (?) and complete the given number series?
4, 5, 12, 39, 160, ?