Quantitative Aptitude - Arithmetic Ability Questions

Which of the following is correct?

Arjun and Anurag complete a job in 6 days and 7 days respectively. They worked together and earned a total of Rs. 780. Find Arjun's share in this amount in Rs. ?

If a young son works quickly for 2 hours and prepares 16 items in a day, and his old father works slowly for 8 hours and prepares 24 items in a day, which of the following is true?

Five men or ten women can complete a job in 20 days. In how many days can 3 men and 4 women complete it?

Mohan earns a profit of 20% on selling a jean at 15% discount on printed price. The ratio of the cost price to printed price of the jean is

What is the difference of the factors of the expression x2 + (1/x2) – 6?

4*(-­0.1(5.5 + 8.5)) of 0.5 = ?

Present ages of Rahul and his brother are in the ratio of 5 : 3. After 4 years ratio of ages of Rahul’s brother and his sister will be 5 : 6. If the present age of his sister is 26 years, then what will be the age (in years) of Rahul 3 years from now?