Aptitude - Numbers - Discussion

@Satchi Mishra.

You are wrong. Not applicable to few no.s like 2^9.
2^9 = 512. unit digit 2.

By your method:

9/5=1, remainder 4.
2^4= 16. unit digit 6.

Not matches the case.

how can you make XI (11) as nine (9) just using a single line using only once
you must not replace or erase any line ...just draw a line any where to make it give nine

What is unit digit? please explain anybody.

How unit digit of (6374)^1793 is 4?

Please explain.

If we have to find tens digit then how we find and the expression is same { (6374) ^1793 x (625) ^317 x (341^491) }?

6374 U.D is 4.
625 U.D is 5.

341 U.D is 1.
4*5*1=20.

20 U.D is 0.
Answer is zero.

Look Friends its Simple:

Just take the last digit of number and last digit of power.

1). Here given is 6374^1793 means you should take 4^3 which is 64
means for 4^3 (4*4=16 and 16*4 is 64 or 6*4 is 24 whose unit digit is 4(remember for finding unit digit always take last digit after multiplication).

2). 625^317 means 5^7 here remember any power to 5 will always have 5 as its unit digit. So here the no is 5.

3). 341^491 means 1^1 is always 1 in its unit digit.

So from 1, 2, and 3 we got three numbers ie 4, 5, 1.

Now multiply these numbers and take the last digit of the product which will be your answer(4*5*1=20).

So 0 is your answer.

What is the unit digit of 7^63* 3^57 * 6^41 ?

What mean by unit digit?

As well say for this: 31.999*12.001*17.5001.