What is the sum of the following series? 1+2+3.........+100=?

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Job Solution Standard Bank Ltd Standard Bank Ltd - Trainee Asst. Officer (Cash) - 22.01.2016 গণিত
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A group of 10 people plan to contribute equally to pay for a friend's gift that costs G dollars. If n additional people want to contribute to pay for the gift, the required contribution per person will be reduced by how many dollars?

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Job Solution Standard Bank Ltd Standard Bank Ltd - Management Trainee Officer - 22.01.2016 গণিত
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Asif can do a job in 15 hours, and Russel can do the same job in 9 hours. If they start doing the job together at 6 a.m., and Russel stops working at 9 a.m., at what time will Asif finish the job?

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If the average of a and b is 45, and the average of b and c is 35 then (a-c)=?

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Job Solution Standard Bank Ltd Standard Bank Ltd - Management Trainee Officer - 22.01.2016 গণিত
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In what ratio must a grocer mix two varieties of tea worth Tk 60 per kg and 65 per kg so that by selling the mixture at Tk 68.20 per kg he may gain 10%?

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Job Solution Standard Bank Ltd Standard Bank Ltd - Management Trainee Officer - 22.01.2016 গণিত
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A man can row three-quarters of a kilometre (km) against the stream in 11.25 minutes and down the stream in 7.5 minutes. The speed (in km/hr) of the man is still water is :

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