जॉइन Examsbookउत्तर : 2. "63"
In the following number series only one number is wrong. Find out the wrong number ?
6, 15, 35, 63, 143, 221, 3235
प्र: In the following number series only one number is wrong. Find out the wrong number ? 6, 15, 35, 63, 143, 221, 323
- 1143false
- 263true
- 3323false
- 435false
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उत्तर : 2. "63"
व्याख्या :
Answer: B) 63 Explanation: Here the series follows the pattern that, product of succesive prime numbers i.e, 2 × 3 = 6 3 × 5 = 15 5 × 7 = 35 7 × 11 = 77 11 × 13 = 143 13 × 17 = 221 17 × 19 = 323 So here in place of 77 the number 63 is written. So the wrong number is 63.