Multiple choice

Based on the number series given, fill in the missing number. 18, 37, 76, 155,____, 633, 1272

  1. 322

  2. 314

  3. 341

  4. 250
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern is x * 2 + 1, x * 2 + 2, x * 2 + 3, etc. 18*2+1=37, 37*2+2=76, 76*2+3=155, 155*2+4=314, 314*2+5=633.

AI explanation

The pattern follows the rule that each term is multiplied by 2, then alternately subtracting and adding 1. For the second term, 18 * 2 + 1 equals 37; for the third term, 37 * 2 + 2 equals 76. The next term is 155, which is 76 * 2 + 3, making the missing term 155 * 2 + 4 = 314. This is verified by the next term being 314 * 2 + 5 = 633.

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