Bangladesh 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.