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Sticky Note
121, 144, 169, 196, what comes next?
  1. 211
  2. 225
  3. 256
  4. 289
Explanation

Check the pattern:

121 = 11 x 11

144 = 12 x 12

169 = 13 x 13

196 = 14 x 14

So each number is a square of consecutive numbers: 11, 12, 13, 14

Next number will be square of 15

15 x 15 = 225


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