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sonu prajapati

· started a discussion

· 1 Months ago

Wrong ans (negative magnitude is greater than positive magnitude so answer will be 6) (Question: 107813.0 )

Ans is wrong ...Ans should be 6 because magnitude of negative no. Is greater than positive no.
For e.g
-6+4=-2 .....Unit digit is 2 because 6>4
If -6+14=-2(difference of unit digit) ...Unit digit will be 10-2=8
Please try to understand what I want to say..

Question:
The unit digit of [(731)102 + (251)725 – (106)100 +(705)35 – (16)4 + 188] is:
Options:
A)

1

B) 3
C) 5
D) 6
Solution:
Ans: (b) Unit digit in [(731)102 + (251)725 – (106)100 + (705)35 – (16)4 + 188]

= [1 + 1 – 6 + 5 – 6 + 8] 

= (1+1-6+5-6+8) = (15-12) =3 

Amit Kumar

· commented

· 1 Months ago

Yet to be approved!
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