For the following questions answer them individually
The ratio of number of boys and girls in a class is 2 : 3. The average weight of boys and girls in the class is 18 kg and 21 kg respectively. What is the average weight (in kgs) of all the boys and girls together
A milk merchant buys 50 litres of milk at the rate of Rs 40 per litre and mixes 5 litres of water in it. If he sells this mixture at the rate of Rs 42 per litre, then what is the profit percentage for the dealer?
If A is 6 times more than B, then by what percentage is B is less than A?
A runner starts running from a point at 6:00 am with a speed of 8 km/hr. Another racer starts from the same point at 8:30 am in the same direction with a speed of 10 km/hr. At what time of the day (in p.m.) will the second racer will overtake the other runner?
A sum amounts to Rs 7727.104 at the rate of 12% per annum compounded annually after three years. What is the value of principal (in Rs)?
When [x + (1/x)] = 5, then what is the value of [x - (1/x)]?
If x = (√2 + 1)/(√2 - 1), then what is the value of $$(x^5 + x^4 + x^2 + x)/x^3$$ ?
If x = 5 - 2√6, then what is the value of √x +(1/√x)?
If 27x + 27[x-(1/3)] = 99, then what is the value of x?
The inradius of a equilateral triangle is 10 cm. What is the circum-radius (in cm) of the same triangle?
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