Multiple choice

Directions: Find the odd one.

190, 166, 145, 128, 112, 100, 91

  1. 145

  2. 100

  3. 112

  4. 128
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D Correct answer
Explanation

Analyzing the differences between consecutive terms: 190-166=24, 166-145=21, 145-128=17, 128-112=16, 112-100=12, 100-91=9. The differences decrease by 3 (24,21,18,15,12,9), but 145-128=17 instead of 18. This breaks the pattern. Alternatively, looking at sums of digits: 190=10, 166=13, 145=10, 128=11, 112=4, 100=1, 91=10 - 128 is the only one not reducing to 1, 4, or 10.

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