Discussion
35, 7, 42, 7, 49, 7, ? What will come at the place of question mark?
Answer: B
The next number is 56. The series is two interleaved series: 35, 42, 49, ... goes up by 7 each time, and the second one is just the number 7 repeated. The terms are 35, 7, 42, 7, 49, 7 and then the series of sevens' multiples continues with \(49 + 7 = 56\). The number 63 would be the term after that, 14 and 21 are not terms of the increasing series, and the repeated 7 comes only at every second place, so the question mark, which falls at the odd place, takes 56.
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