Multiple choice general knowledge math & puzzles

361, 289, _______, 169, 121

  1. 220

  2. 221

  3. 222

  4. 223

  5. 224

  6. 225
Reveal answer Fill a bubble to check yourself
F Correct answer
Explanation

The sequence consists of squares of descending odd numbers: 19²(361), 17²(289), 15²(225), 13²(169), 11²(121). The missing value is 225.

AI explanation

To find the missing number in the given sequence, let's observe the pattern between the numbers:

361, 289, _______, 169, 121

By looking at the given numbers, we can see that each number is the square of a certain value:

19^2 = 361 17^2 = 289 13^2 = 169 11^2 = 121

Therefore, the missing number should be the square of the next smaller number, which is 15:

15^2 = 225

So, the missing number in the sequence is 225.

The correct answer is option F) 225.

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