A person can buy a refrigerator for Rs.15,850 on cash payment or in installments for every year at 10% p.a for four years compounded annually. What is the approximate annual installment that he should pay?

The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is: 

The difference between a discount of 30% on ₹ 2,000 and two successive discounts of 25% and 5% on the same amount is 

If there is a reduction in the number of workers in a factory in the ratio 65 : 17 and an increment in their wages in the ratio 34 : 125, then the ratio by which the total wages of the workers should be decreased is-

A team played 40 games in a season and won 24 of them. What percent of games played did the team win? 

What is the largest four digit number which is also complete?

The HCF and LCM of two number are 20 and 120, respectively. If one number is 50 percent more than the other number, then which is the smaller number.