Question

Find the least number which must be added to 18, 265 to obtain a perfect square.

• A. 232
• B. 231
• C. 237
• D. 233

Answer 1

The correct option is B

231

Use long division to find the closest square root.

Clearly, 18265 is greater than ${135}^2$

We need to add a number to 18265, such that the resultant is the square of 136.

i.e., ${136}^2=18496$

So, required number = 18496 - 18265 = 231