Question

The unit's digit of the expression 256521 + 36528
+ 36528 + 7354 is
A) 3
B) O
C) 4
D)​

Answer 1

Answer:

The unit digit of the expression is 1.

Answer 2

Explanation:

Correct Option: B

Unit digit in the expansion of 256251

= Unit digit in the expansion of 56251 = 5

36528 ≡ Unit digit in 6528 = 6

Now, 31 = 3,

32 = 9,

33 = 27 ;

34 = 81,

35 = 243....

∴ 7354 = 7352 × 732

≡ 32 = 9

∴ Required digit = Unit’s digit of the sum 5 + 6 + 9 = 0