Question : In an exam, the sum of the scores of A and B is 120, that of B and C is 130, and that of C and A is 140. Then the score of C is:

Option 1: 65

Option 2: 75

Option 3: 70

Option 4: 60

Question : In $\triangle ABC$, the internal bisectors of $\angle B$ and $\angle C$ meet at point $O$. If $\angle A = 80^\circ$, then $\angle BOC$ is equal to:

Option 1: $100^\circ$

Option 2: $120^\circ$

Option 3: $130^\circ$

Option 4: $140^\circ$

Question : The average of 13 results is 70. If the average of the first seven is 65 and that of the last seven is 75, the seventh result is:

Option 1: 67

Option 2: 70

Option 3: 68

Option 4: 70.5

Question : If $9 a+9 b+9 c=81$ and $4 a b+4 b c+4 c a=160$, then what is the value of $6 a^2+6 b^2+6 c^2$?

Option 1: 1

Option 2: 3

Option 3: 4

Option 4: 6

Question : Student A got 25 marks more than student B and the marks of A were equal to 60% of the sum of their marks. What are the marks obtained by A and B respectively?

Option 1: 75 and 100

Option 2: 75 and 50

Option 3: 45 and 120

Option 4: 55 and 80

Question : A number is first increased by 8% and then decreased by 3% to get 2619. What is 5% of that number?

Option 1: 125

Option 2: 135

Option 3: 130

Option 4: 140