1.

If a and b are positive integers, such that ba = 50625, then (b - 1)b + a - 2 = ?1. 12122. 14173. 13124. 1217

Answer» Correct Answer - Option 2 : 1417

Given:

ba = 50625

Calculation:

50625 = 3 × 3 × 3 × 3 × 5 × 5 × 5 × 5 

ba = (15)4

∴ b = 15 and a = 4

Now, (b - 1)b + a - 2 

⇒ (15 - 1)15 + 4 - 2

⇒ 1419 - 2

⇒ 1417 



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