Quantitative Aptitude - Arithmetic Ability Questions

The number of students in a class is increased by 20% and the number now becomes 66. Initially the number was

If Reena sold 12 mobile phones for Rs. 1,88,160 which cost Rs. 14,056 per phone, what was the total profit made by her?

A man buys 10 oranges for Rs. 3 and sells 8 for Rs. 3. Calculate his gain percent.

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.

If  x=2+32-3, then what is the value of x+1/x ?

On dividing a certain number by 342 we get 47 as remainder. If the same number is divided by 18, what will be the remainder ?

What is the value of Cot 45° - (1/√3)Cosec 60°?

What is the value of equation a3+b3+c3-3abc if a2+b2+c2=ab+bc+ca+4 and a+b+c = 4.