Q1. The surface area of a sphere of radius 2.1 cm is …

Q2. The greatest number that will divide 33, 64, 80 leaving remainders 3, 4 and 5 respectively -

Q3. 5 pencils and 4 erasers is cost Rs. 13 whereas 9 pencils and 5 erasers cost Rs. 19. Then the price of 6 pencils and 3 eracers is -

Q4. The simple interest accured on an amount of Rs. 22,500 at the end of four years is Rs. 10,800. What would be the compound interest accured on the same amount at the same rate at the end of two years.

Q5. 24 men can complete a piece of work in 14 days. 2 days after they started working, 4 more men joined them and after 2 more days and 6 men left. How many more days will they now take to complete the remaining work?

Q6. A started a business with an investment of Rs. 14,000. After 2 months B joins in with 6/7 of the amount that A invested and A withdraws Rs. 4,000. After 2 more months, C joins with Rs. 8,000 and A again withdraws Rs. 2,000. After a year, if C received Rs. 2,656 as his share then what was the total profit?

Q7. The radius of the circle whose area is equal to the sum of the area of the two circles. Whose radii are 5 cm and 12 cm respectively is -