Aptitude - Numbers - Discussion

Discussion Forum : Numbers - General Questions (Q.No. 10)

Numbers

10.

What is the unit digit in {(6374)¹⁷⁹³ x (625)³¹⁷ x (341⁴⁹¹)}?

Answer: Option

Explanation:

Unit digit in (6374)¹⁷⁹³ = Unit digit in (4)¹⁷⁹³

= Unit digit in [(4²)⁸⁹⁶ x 4]

= Unit digit in (6 x 4) = 4

Unit digit in (625)³¹⁷ = Unit digit in (5)³¹⁷ = 5

Unit digit in (341)⁴⁹¹ = Unit digit in (1)⁴⁹¹ = 1

Required digit = Unit digit in (4 x 5 x 1) = 0.

Discussion:

123 comments Page 11 of 13.

Nafeesa said: 7 years ago

Thanks for the answer @Vasudevan.

Abhishek said: 1 decade ago

Hemant method is very good..
Thx

Nilkanta Das said: 6 years ago

Nice explanation, Thanks all.

Abitha said: 5 years ago

Thanks for explaining @Seema.

Deepi said: 1 decade ago

Thanks to seema and jhansi.

Neeha said: 1 decade ago

Please explain in briefly.

Nandish said: 1 decade ago

Thank you seema. Got it.

Daniel Jeff said: 1 decade ago

What mean by unit digit?

RADHAKRISHNAN E said: 9 years ago

yes you are good @Seema.

Reshma said: 9 years ago

Thank you @Nidhin M Z.

Post your comments here:

Quick links

Quantitative Aptitude

Verbal (English)

Reasoning

Programming

Interview

Placement Papers