What will be the unit digit of the square of $799$?

Question 1 (iii)
What will be the unit digit of the squares of the following number:

799

What will be the unit digit of the squares of the following numbers?

(i) 81 (ii) 272

(iii) 799 (iv) 3853

(v) 1234 (vi) 26387

(vii) 52698 (viii) 99880

(ix) 12796 (x) 55555

What will be the unit digit of square of 34?