Question 4
Write the correct answer from the given four options.
Which of the following will have 4 at the unit's place?
a) 142
b) 622
c) 272
d) 352
The unit place of the square of 14 =42=16=6
The unit place of the square of 62 =22=4 [∵22=4]
The unit place of the square of 27 =72=49=9
The unit place of the square of 35 =52=25=5
Clearly, 622 has 4 at the unit's place.