Multiple choice

Directions: Find the wrong term in the series. 7, 8, 18, 57, 235, 1165

  1. 18

  2. 57

  3. 235

  4. 1165
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C Correct answer
Explanation

Pattern: *1+1, *2+2, *3+3, *4+4, *5+5. 7*1+1=8, 8*2+2=18, 18*3+3=57, 57*4+4=232 (not 235), 232*5+5=1165. The wrong term is 235.

AI explanation

The series follows a pattern where each term is multiplied by an increasing integer and then that same integer is added to find the next term: multiply by 1 and add 1, multiply by 2 and add 2, multiply by 3 and add 3. We calculate 7 * 1 + 1 = 8, 8 * 2 + 2 = 18, 18 * 3 + 3 = 57, and 57 * 4 + 4 = 232. The term 235 is incorrect because it should be 232.

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