Quantitative Aptitude - Arithmetic Ability Questions

If  a+1/a = 3, then a3+1a3?

Select the odd word/letters/number/number pair from the given alternatives.

If √x ­- √y = 1 , √x + √y = 17 then √xy = ?

There is 40% increase in an amount in 8 years at simple interest. What will be the compound interest (in rupees) of Rs 30000 after 2 years at the same rate?

Rahul can complete a work in 18 days and Sonu can complete the same work in 15 days. If both together work for 5 days, then what part of total work is left?

ΔABC is right angled at B. BD is its altitude. AD = 4 cm and DC = 12 cm. What is the value of AB (in cm)?

A man purchased a cycle for Rs.3000/- and agreed to pay 12% on the amount as interest. He repaid principal and interest in 12 equal monthly installments. Find the amount of each installment.