Exam Maths Puzzle Numerical Ability

3 men or 8 boys can do a piece of work in 17 days. how many days will 2 men and 6 boys together take to complete the work

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Exam Other Question

In a city, 35% of the population is composed of migrants, 20% of whom are from rural areas. Of the local population, 48% is female while this figure for rural and urban migrants is 30% and 40% respectively. If the total population of the city is 728400, what is its female population 7
(a)324138
(b) 349680
(c) 509940
(d) None
12,12,18,45,180,1170, ?