Which Index number satisfies both the time reversal test

A machine bought at Rs. 50,000 falls in its value by 8% of its value every year. Find the value of the machine after 2 years.

The value of a motor cycle 2 years ago was ₹ 70,000. It depreciates at the rate of 4% p.a. Find its present value.

The largest four digit number which when divided by 4, 7 and 13 leaves a remainder 3 in each case is

A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?

If Karkuzhali earns ₹ 1,800 in 15 days, then she earns ₹3,000 in ___________days.

Find the G.C.D. of the following:

35x⁵ y³ z⁴, 49x² yz³, 14xy² z²

Find the missing number

2, 4, 12, 48, 240, .....

The curved surface area of a right circular cone of height 15 cm and base diameter 16 cm is

The highest number which divides the product of any three consecutive even natural number is