Lessons

General Aptitude
9.1 Numbers - General Questions

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Q.

What is the unit digit in the product (365 x 659 x 771)?

View Answer

Correct choice: D

Explanation:

Unit digit in 34 = 1 Unit digit in (34)16 = 1

∴ Unit digit in 365 = Unit digit in [ (34)16 x 3 ] = (1 x 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 x 73] = (1 x 3) = 3

∴ Required digit = Unit digit in (3 x 6 x 3) = 4.

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