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

If a/b = 3/5, b/c = 4/7 then a:b:c is

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.

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

35x⁵ y³ z⁴, 49x² yz³, 14xy² z²

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?

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

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

Find the LCM of pair of the following polynomials x⁴ – 27a³ x, (x-3a)², whose GCD is (x-3a)

Select the number from the given options which will come in place of the question mark (?) in the following series. 

6, 12, 14, 28, 30, 60, ?

Find the missing number

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