‘A’ started working alone and completed 30% of the work in 18 days. After that, he was joined by ‘B’ and they both together completed the remaining work in 24 days. Find the time taken by ‘B’ to finish the same work alone.

The interest earned on investing Rs. 6,000 for ‘x’ years at compound interest (compounded annually) of 15% p.a., is Rs. 1,935. Find the simple interest received if Rs. 6000 is invested at 15% p.a. for ‘x’ years.

An article is marked 80% above its cost price and is sold for Rs. 1,224 after giving two successive discounts of 20% and 15%, respectively. Find the difference between marked price and cost price of the article.

There are two types of rice i.e. type ‘I’ and type ‘II’, costing Rs. 41/kg and Rs. 76/kg, respectively. 36 kg of the type ‘I’ rice should be mixed with how much quantity of type ‘II’ of rice so that the cost of the final mixture becomes Rs. 55/kg.

The ratio of age of Riya 6 years ago from now to the age of Manju 6 years hence from now, is 4:7. If average of present ages of Riya and Manju is 33 years, then find the difference between present ages of Riya and Manju.

The radius of a circle is equal to the length of each side of a square. If the area of square is 225 cm2, then find the circumference of the circle. [Take π = 3 cm]

In a given years, Rahul sold 1500 caps while Ankit sold 30% more number of caps than Rahul and Rashi sold 20% less number of caps than Ankit. Find the ratio between the number of caps sold by Rashi to that by Rahul in the given year.

What will come in place of the question mark (?) in the following series?

400, 394, 378, 352, 316, ?

What will come in place of the question mark (?) in the following series?

18, 31, 42, 49, 54, ?

The ratio of the pocket money of two persons ‘A’ and ‘B’ is 5:3, respectively. ‘A’ spends 80% of his pocket money while ‘B’ spends 75% of his pocket money. If the savings of ‘A’ is Rs. 120 more than that of ‘B’, then find the total pocket money of ‘A’.

A certain sum when invested at compound interest of 20% p.a. amounts to Rs. 3528 in 2 years. Find the amount received when the same sum is invested at 30% p.a. simple interest for 3 years.

The cost of fencing a rectangular plot at the rate of Rs. 14.5/metre is Rs. 1740. If the ratio of the length to breadth of the rectangular plot is 7:5 then find the area of the rectangular plot.

Pipe 'A' alone can fill 75% of a cistern in 18 minutes. Pipes 'A' and 'B' when opened together, take 33 minutes to fill the empty cistern. Find the time taken by pipe 'B' alone to empty the cistern.

A sum of Rs. 1220 is divided between two friends Ram and Ranjan in the ratio (7/9):(11/12). Find the difference between the amounts received by Ram and Ranjan.

‘A’ and ‘B’ started a business by investing Rs. 1980 and Rs. 3520 respectively. 18 months later, ‘B’ withdrew his entire investment. 20 months after starting the business, find the ratio of profit shares of ‘A’ and ‘B’ respectively.

The ratio of length to breadth to height of a cuboidal box is 8:4:3. If the total surface area of the cuboid is 2,176 sq cm, then find its lateral surface area.

A field roller is in the shape of a cylinder whose diameter is 2.5 metres and length is 5.6 metres. If the roller rolls at a speed of 15 revolutions per minute, then find the maximum area (in sq.m) that it can roll in 45 minutes.