Find the smallest number which should be added to the smallest number divisible by 6, 9 and 15 to make it a perfect square.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 10.
Smallest number divisible by 6, 9 and 10 = LCM of 6, 9 and 10 = 90
Nearest square greater than 90 = 100
Number to be added to 90 = 100 - 90 = 10