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Find the least number which when added to or subtracted from 1850 makes it a perfect square.

A.	2	B.	1
C.	3	D.	4

Answer and Explanation

Answer:1

Explanation:
1850 is (1849 + 1)...i.e. (43)2 + 1and also (1936 - 86) i.e (44)2 – 86.So, if 1 is subtracted from 1850 or if 86 is added to 1850, we get perfect squares. SO, the least number to be added or subtracted to get a perfect square is1.

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