A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?
A. 3
B. 4
C. 5
D. 6
A. 3
B. 4
C. 5
D. 6

How do you find the Maclaurin series for tanx?
Last Activity: 10 Months ago

Why is Axiom 5, in the list of Euclid’s axioms, considered a ‘universal truth’? (Note that the equation is not about the fifth postulate.)
Last Activity: 10 Months ago

The smallest composite number is ______.
(a) 2
(b) 4
(c) 1
(d) None of these
Last Activity: 10 Months ago

Find the arithmetic mean of the first ten odd natural numbers.
Last Activity: 10 Months ago
