Multiple choice

Find the missing number in the following series. $72, 432, ?, 1748, 1751, 3502$

  1. 451

  2. 478

  3. 425

  4. 437
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Analyze the pattern: 72 to 432 (x6), 432 to ? (? to 1748), 1748 to 1751 (+3), 1751 to 3502 (x2). This is an alternating pattern: x6, x?, +3, x2. Notice 432 x 1.01... doesn't work. Let me reconsider: 72 x 6 = 432, then 432 + 5 = 437, 437 x 4 = 1748, 1748 + 3 = 1751, 1751 x 2 = 3502. The pattern is: x6, +5, x4, +3, x2. So the missing number is 432 + 5 = 437, matching option D.

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