Seven years ago, the average age of A, B and C was 51 years. If A is 3 years older than B and B is 3 years older then C then the present ages of A, B and C are ( in year)
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A can do a work in 20 days and B in 50 days. If they work on it together for 5 days, then what fraction of work is left?
A car travels a certain distance at 70 km/h and comes back at 30 km/h. Find the average speed for total journey.
If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).
25% discount is offered on an item. By applying a promo code the customer wins 8% cash back. What is the effective discount?
What is the simplified value of [2/(cot A – tan A)]?
If a2+b2+c2=14 and a+b+c=6, then the value of ab+bc+ca is,
A can do a work in 36 days and B in 12 days. If they work on it together for 3 days, then what fraction of work is left?
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