Multiple choice

Find the missing number (?) in the given series. 767 495 359 291 257 ?

  1. 120

  2. 240

  3. 57

  4. 68

  5. 189
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B Correct answer
Explanation

Find the pattern in differences: 767 - 495 = 272, 495 - 359 = 136, 359 - 291 = 68, 291 - 257 = 34. Each difference halves the previous one: 272, 136, 68, 34. Next difference is 17, so 257 - 17 = 240.

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