Question 45
Fractions, Decimals and ApproximationFind the smallest value of k such that 22 × 33 × 5 × k is a perfect square.
- A.3
- B.5
- C.15
- D.30
Show the answer and explanation
Answer: C (15)
Explanation
Every prime needs an even power. 33 needs one more 3 and 5 needs one more 5, so k = 3 × 5 = 15.