Powers and Roots Practice Test 3

Question : 4 of 40

Marks: +1, -0

Find the square of 489 among the following:

1,27,826
65,88,711
2,39,121
3,295
45,682

Solution:

(489)^2 = ?

Clearly, the square of an odd number cannotbe 6 and 2 in unit digit. The square of a 3-digitnumber will have at least 5 digits or maximum6 digits.
So,

(489)^2 = 2,39,121

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