Question : The ratio of the ages of two boys is 5 : 6. After two years, the ratio will be 7 : 8. Determine the ratio of their ages after 12 years.

Question : Directions: By Interchanging the given two numbers (Not digits) which of the following equations will be correct?
8 and 7
I. 8 + 7 × 9 ÷ 3 – 6 = 25
II. 7 × 5 – 8 + 6 ÷ 2 = 38

Question : Directions: By Interchanging the given two numbers (not digits) which of the following equations will not be correct?
7 and 4
I. 4 × 3 – 7 + 8 ÷ 2 = 23
II. 7 × 5 – 9 ÷ 3 + 4 = 24

Question : Which of the following statements is true?
I. $\frac{1}{2}+\frac{1}{6}+\frac{1}{12}=\frac{3}{4}$
II. $\frac{1}{6}+\frac{1}{12}+\frac{1}{20}=\frac{3}{5}$

Question : Which of the following pairs of "elements - valency" is correct?
I. Boron - 2
II. Fluorine - 3