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rajesh786

· started a discussion

· 1 Months ago

Ans should be 7 (Question:605024.0)

Option b

Question:

What is the unit digit of (8877 – 7788) = ?

Options:
A) 3
B) 7
C) 8
D) 1
Solution:
Cyclicity of 8 is 4 -

\(\therefore\) \(\frac{77}{4} \rightarrow Remainder=1\)

81 = 8

Cyclicity of 7 is 4 -

\(\therefore\frac{88}{4}\rightarrow Remainder =0\)

74 = 1

8 - 1 = 7

Knowledge Expert

· commented

· 1 Months ago

Dear student
We have fixed the ambiguity of the question.

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