Bangladesh Bank Math Solution Written exam





Bangladesh Bank AD written math solutionBangladesh Bank recruitment examination 2014 written math solution for the post of Assistant Director are given below –

Math question – 01. a, b, c, d, e are 5 consecutive numbers in increasing order, deleting one of them from the set decreased the sum of the remaining numbers by 20% of the sum of 5. Which one of the number is deleted from the set?

Solution:

Let, the consecutive numbers are,
a =1, b = 1 + 1 = 2, c = 1 + 2 = 3, d = 1 + 3 = 4 & e = 1 + 4 = 5
So, total = 1 + 2 + 3 + 4 + 5 = 15
Deleting 1 of the 5 numbers from the set then decreased 20% of the sum.
20% of the sum = (15 x 20)/100 = 3
So, the deleted number is the 3rd as c from the set Ans.



Math question – 02. Rahim bought 2 varieties of rice costing tk 5 & 6 per kg each. Then he sold the mixture at Tk 7/kg, making profit of 20%. What was the ratio of the mixture?

Solution:

Let, Rahim bought x kg rice at tk 5 & y kg rice at tk 6/kg
So, total cost = 5x + 6y and sale price = 7x + 7y
20% profit = 20*(5x + 6y)/100 = (5x + 6y)/5

According to question, 7x + 7y – (5x + 6y) = (5x + 6y)/5
Or, 2x + y = (5x + 6y)/5
Or, 10x + 5y = 5x + 6y
Or, 5x = y
Or, x/y = 1/5 Ans.



Math question – 03. A team of 2 men and 5 women completed 1/4th of a job in 3ds. After that another man joined them and they all complete the next 1/4th of the job in 2ds. How many men can complete the whole job in 4 days?

Solution:

Here, in 3ds, 2 men & 5 women do 1/4 part
So, in 1 d 2 men & 5 women do 1/12 part

Again, in 2ds, 3 men & 5 women do 1/4 part
or in 1d 3 men & 5 women do 1/8 part
1 mans’ 1 day work = 1/8 – 1/12 = 1/24 part

So, in 24ds the whole job can be done by 1 man
In 4ds the whole job can be done by = 24/4 = 6 men’ Ans.

 

Bangladesh Bank Assistant Director exam math solution for the year 2014. That will help you to take preparation for Bangladesh Bank recruitment exam in future.

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