Quantitative Aptitude - Arithmetic Ability Questions

A man is 3 years older than his wife and four times as old as his son. If the son becomes 15 years old after 3 years. Then what is the present age of the wife?

Find two numbers whose sum is 29 and the product is 100.

If 123 x 356 = 43788, then 1.23 x 0.356 = ?

While selling a watch, a shop-­keeper gives a discount of 5%. If he gives a discount of 7%, he earns Rs.15 less as profit. The marked price of the watch is

If 31% of an electricity bill is deducted, Rs 1794 is still to be paid. How much was the original bill amount?

If 'Q ' means ' +', 'J ' means ' X',T ' ' means '- ' and 'K ' means '÷ ', then what is the value of18K3Q7J ?

A, B and C can do job in 9, 12 and 36 days respectively if they worked alone. A leaves after they have worked together for 3 days. In how many days can B and C do the rest of the job?

If a + a2 + a3 – 1 = 0, then what is the value ofa3 + (1/a)?