Exams

If 5Δ1 = 40, 9Δ9 = 0 and 7Δ1 = 60, then find the value of 4Δ9 = ?

A boy spends Rs 20 to purchase toffees at Rs 1 each. Next day, he purchased some toffees for Rs 40 with a discount of 50 paise per toffee. What is the average price per toffee (in paise)?

Which one of the following is a cation?

How many prime numbers are there between the positive integers 60 and 100?

In the following question, out of the four alternatives, select the alternative which will improve the bracketed part of the sentence. In case no improvement is needed, select "no improvement".

They are giving something back to the planet that (being defiled) every day in a thousand ways.

Which Indian state is the largest producer of Soyabean?

A wholesaler purchased 7 hair clips for a rupee. How many for a rupee must he sell to get profit of 40%.

The famous tennis player Steffi Graf belongs to which among the following countries?