What is the unit digit in the product (365 × 659 × 771)?
A. 1
B. 2
C. 4
D. 6
E. None of these
Answer: Option C
Solution(By Examveda Team)
Unit digit in 34 = 1 ⇒ Unit digit in (34)16 = 1Therefore Unit digit in 365 = Unit digit in [ (34)16 × 3 ] = (1 × 3) = 3
Unit digit in 659 = 6
Unit digit in 74 ⇒ Unit digit in (74)17 is 1
Unit digit in 771 = Unit digit in [(74)17 × 73] = (1 × 3) = 3
Therefore Required digit = Unit digit in (3 × 6 × 3) = 4
Join The Discussion
Comments ( 3 )
Related Questions on Number System
Three numbers are in ratio 1 : 2 : 3 and HCF is 12. The numbers are:
A. 12, 24, 36
B. 11, 22, 33
C. 12, 24, 32
D. 5, 10, 15
its wrong pls dont do it
How come 6^59=6..
shouldn't it be 6^56=6..
I didn't understand the problem.. please tell me..