Determine if the following ratios form a proportion. Also, write the middle terms and extreme terms where the ratios form a proportion. a 25cm:1m and Rs. 40:Rs. 160 b 39 litres : 65 litres and 6 bottles: 10 bottles c 2kg : 80kg and 25 g: 625g d 200 ml:2.5 litre and Rs. 4 : Rs. 50

How do you find the Maclaurin series for tanx?

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.)

The smallest composite number is ______.

(a) 2

(b) 4

(c) 1

(d) None of these

Find the arithmetic mean of the first ten odd natural numbers.

A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream in 6 hours and 30 minutes. The speed of the boat in still water is

A. 10 km/hr

B. 4 km/hr

C. 14 km/hr

D. 6 km/hr