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Speed while going to school = x/3 Speed while returning = x Average speed = (2 × S1 × S2)/(S1 + S2) => 24 = (2 × x/3 × x)/(x/3 + x) => x = 48 Speed while going to school = 48/3 = 16 km/hr
124, 180, 108, 198, ?, 220
1236, 1445, 1675, 1933, 2226, ?
78, 80, 84, ?, 108, 140
4, 4, 12, 60, ?, 3780
What will come in place of (?) question mark in the given number series.
960, 960, 480, ?, 40, 8
86, 127, ?, 209, 250, 291
244, 179, 129, 92, 66, ?
?, 32, 75, 144, 245, 384
81 72 136 111 ? 278
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