Q6. 
What is the remainder when $3^7$ is divided by $8$? 
A.  1 

B.  2 

C.  3 

D.  5 
Q7. 
A boy writes all the numbers from 100 to 999. The number of zeroes that he uses is '$a$', the number of 5's that he uses is '$b$' and the number of 8's he uses is '$c$'. What is the value of $b+ca$? 
A.  280 

B.  380 

C.  180 

D.  80 
Q8. 
Find the unit's digit in $264^{102} + 264^{103}$ 
A.  0 

B.  2 

C.  4 

D.  6 
Q9. 
In a meet, persons from five different places have assembled in Bangalore High School. From the five places the persons come to represent are $42,60,210,90$ and $84$. What is the minimum number of rooms that would be required to accommodate so that each room has the same number of occupants and occupants are all from the same places? 
A.  44 

B.  62 

C.  81 

D.  96 