What will come in the place of questions (?) mark in following number series.…
2021
What will come in the place of questions (?) mark in following number series.
9, 19, 39, 79, ?, 319
Answer: D. 159 — Each term is doubled and 1 is added: 9, 19, 39, 79, 159, 319.
- A.
221
- B.
175
- C.
125
- D.
159
- E.
199
Attempted by 194 students.
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Correct answer: D
Each term is doubled and 1 is added: 9, 19, 39, 79, 159, 319.
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