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Bank exam Exam Pattern, Bank exam Questions with Answers Page 4

(#M40165302) BANK EXAM QUESTION area Keep an EYE

1.5m path is to be constructed along the rectangular plot inside. The area of plot is 1400sqm and perimeter of plot is 150m. If the rate of construction is 50 per sq m , find the total cost of construction?

Asked In Bank Exam CHENNADI HARIKA (7 years ago)

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(#M40165301) BANK EXAM QUESTION percentages Keep an EYE

if the price of sugar increases by 28%, What should be the percentage decrease in consumption of sugar of that expenditure remains constant?

Asked In Bank Exam CHENNADI HARIKA (7 years ago)

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(#M40165289) BANK EXAM QUESTION anything Keep an EYE

whTEVER YOU WISH

Asked In Bank Exam priya (7 years ago)

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(#M40165015) BANK EXAM QUESTION HCF/LCM Keep an EYE

X is the greatest number which divides 1305, 4665 and 6905 and gives the same remainder in each case.
What is the sum of the digits in X?

Asked In Bank Exam insha singh (7 years ago)

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(#M40164994) BANK EXAM QUESTION TRICK Keep an EYE

displaystyle{text{Number of pairs * Sum of each pair} = (frac{n}{2})(n+1) = frac{n(n+1)}{2}}
which is the formula above.

Wait — what about an odd number of items?
Ah, I’m glad you brought it up. What if we are adding up the numbers 1 to 9? We don’t have an even number of items to pair up. Many explanations will just give the explanation above and leave it at that. I won’t.

Let’s add the numbers 1 to 9, but instead of starting from 1, let’s count from 0 instead:

0 1 2 3 4
9 8 7 6 5
By counting from 0, we get an “extra item” (10 in total) so we can have an even number of rows. However, our formula will look a bit different.

Notice that each column has a sum of n (not n+1, like before), since 0 and 9 are grouped. And instead of having exactly n items in 2 rows (for n/2 pairs total), we have n + 1 items in 2 rows (for (n + 1)/2 pairs total). If you plug these numbers in you get:

displaystyle{text{Number of pairs * Sum of each pair} = (frac{n + 1}{2})(n) = frac{n(n+1)}{2}}

which is the same formula as before. It always bugged me that the same formula worked for both odd and even numbers – won’t you get a fraction? Yep, you get the same formula, but for different reasons.

Technique 2: Use Two Rows
The above method works, but you handle odd and even numbers differently. Isn’t there a better way? Yes.

Instead of looping the numbers around, let’s write them in two rows:

1 2 3 4 5 6 7 8 9 10
10 9 8 7 6 5 4 3 2 1
Notice that we have 10 pairs, and each pair adds up to 10+1.

The total of all the numbers above is

displaystyle{text{Total = pairs * size of each pair} = n(n + 1)}

But we only want the sum of one row, not both. So we divide the formula above by 2 and get:

displaystyle{frac{n(n + 1)}{2}}

Now this is cool (as cool as rows of numbers can be). It works for an odd or even number of items the same!

Asked In Bank Exam KICK (7 years ago)

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(#M40164992) BANK EXAM QUESTION Keep an EYE

Two vessels contain spirit of 0.5 and 0.75
concentrations. If 2 litres from the first vessel and
3 litres from the second vessel are mixed, then
what will be the ratio of the spirit and the water in
the resultant solution

Asked In Bank Exam Srikant Kumar Das (7 years ago)

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(#M40164835) BANK EXAM QUESTION probability Keep an EYE

tickets are numbered from 1,2,,,,1100 and one card is drawn randomly what is the probability of having 2 as a digit

Asked In Bank Exam Mukundan (8 years ago)

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(#M40164773) BANK EXAM QUESTION number series Keep an EYE

1.) 101,?,106,124,220,820

2.) -629,-431,?,-167,-89,-39

Asked In Bank Exam khushi (8 years ago)

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(#M40164654) BANK EXAM QUESTION time and work Keep an EYE

Three men A ,B and C working together can do a job 6 hours less time than A did alone ,1 hour less time than B alone and half the time needed by C .In how many days will A finish the work alone

Asked In Bank Exam ram (8 years ago)

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(#M40164638) BANK EXAM QUESTION percentage Keep an EYE

In an examination a candidateobtained 32% marks and failed by 16 marks. Another candidate obtained 36% marks which is 10 marks more than the minimum necessary marks to pass. Find the passing marks?

Asked In Bank Exam MANINDER KAUR (8 years ago)

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