Problem on Numbers example 1


Problem on Numbers example 1

Shortcut Tricks are very neccesary things in competitive exam. The main factor is time in competitive exams. If you know time management then everything will be easier for you. Most of us skip that part. Few examples on problem on numbers shortcuts is given in this page below. All tricks on problem on numbers are provided here. Visitors are requested to carefully read all shortcut examples. These examples here will help you to better understand shortcut tricks on problem on numbers.

This chapter is based on problem on numbers example 1 and the question are given in the form of a set of Numbers and are in the form of a puzzle form. We just need to examine the given condition and assume the unknown numbers and form equations accordingly. So Here is some Problems based on Numbers which provides you for better practice.

In this page we will discuss some basic ideas of Problem on Numbers. On the basis of these ideas we will learn trick and tips of shortcut problem on numbers.
More you practice then more you learn and keep practice in time. If you think that how to solve problem on numbers questions using problem on numbers shortcut tricks, then further studies will help you to do so.

 

 


Example #1
The sum of five consecutive odd numbers is 585. What is the sum of largest and twice the second smallest number?

  1. 351
  2. 386
  3. 419
  4. 475

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Answer: Option (A)
How to Solve
Sum of five consecutive odd numbers is 585.
So, the third number is,
585 / 5
= 117.

So, all five odd numbers are,
113, 115, 117, 119 and 121.

Largest odd number is 121.
Twice the second smallest number is (115 x 2) = 230.

So, Sum is,
121 + 230
= 351.

Rough Workspace

Example #2
Find the average of the following number of set of scores 297, 845, 453,124, 198, 169.

  1. 340.4
  2. 347.5
  3. 351.9
  4. 355.5

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Answer: Option (B)
How to Solve
( 297 + 845 + 453 + 124 + 198 + 168 ) / 6
= 347.5
Rough Workspace

Example #3
A customer purchase 8 kg apple per day. How many kg of apple will he order in 4 weeks?

  1. 206 kg
  2. 216 kg
  3. 224 kg
  4. 232 kg

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Answer: Option (C)
How to Solve
4 weeks = ( 4 x 7 ) = 28 days.
So, he will order,
28 x 8
= 224 kg.
Rough Workspace

Example #4
Sanjay, Suraj and Sanam prepared for running around a circular field. they complete one round in 12 seconds, 8 seconds, 20 seconds respectively. Find how much time will require to meet them again at the starting position?

  1. 48 seconds
  2. 2 minutes
  3. 4 minutes
  4. 9 minutes

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Answer: Option (B)
How to Solve
L.C.M of 12, 8, 20 is 120 seconds.
So, required time is 2 minutes.
Rough Workspace

Example #5
To filled a tank it is required 119 liter of petrol, then how many tanks would be required to fill 2142 liter of petrol?

  1. 12
  2. 14
  3. 16
  4. 18

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Answer: Option (D)
How to Solve
2142 / 119 = 18
Rough Workspace

Example #6

? / 2025 = 81 / ?
What number should places in the question mark?

  1. 405
  2. 427
  3. 449
  4. 471

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Answer: Option (A)
How to Solve
? / 2025 = 81 / ?
? x ? = 2025 x 81
?2 = 452 x 92
? = 45 x 9
? = 405
Rough Workspace

Example #7
If (12)3 is subtracted from the square of a number and answer is 2497. What would be the number?

  1. 53
  2. 65
  3. 71
  4. 87

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Answer: Option (B)
How to Solve
Let, the number is X.
X2 – 123 = 2497
X2 = 2497 + 1728
X = √4225
X = 65
Rough Workspace

Example #8
A cable is reap in 40 pieces each of 9 meter. If length of each pieces is increased by 3 meter, how many pieces will be formed?

  1. 20
  2. 25
  3. 30
  4. 34

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Answer: Option (C)
How to Solve
Total length of the cable is,
40 x 9
= 360 meter.

If length of each pieces is increased by 3 meter, i.e, ( 9 + 3 ) = 12 meter,
Then total pieces will be,
360 / 12
= 30 pieces.

Rough Workspace

Example #9
The difference between 68% of a number and 36% of the same number is 4780. What would be the 16% of that number?

  1. 2022
  2. 2148
  3. 2246
  4. 2390

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Answer: Option (D)
How to Solve
68% – 36% = 4780
32% = 4780
16% = 4780 x 16 / 32
16% = 2390.
Rough Workspace

Example #10
A shop owner sold 15 kg of apple per day. How many kg of apple will he sale in 5 weeks?

  1. 525 kg
  2. 555 kg
  3. 575 kg
  4. 595 kg

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Answer: Option (A)
How to Solve
5 weeks = ( 5 x 7 ) = 35 days.
So, he will sale,
35 x 15
= 525 kg.
Rough Workspace

Example #11
If the difference of a number and it’s 1/8 part is 35, then what would be the number?

  1. 32
  2. 36
  3. 40
  4. 44

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Answer: Option (C)
How to Solve
Let the number be X.
X – X / 8 = 35
7X / 8 = 35
7X = 280
X = 40
Rough Workspace

Example #12
A box has 18 dozen of candles. If there are 37 such boxes, then how many candles are there in all the boxes together?

  1. 6745 candles
  2. 7992 candles
  3. 8236 candles
  4. 8643 candles

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Answer: Option (B)
How to Solve
18 dozen of candles means,
18 x 12
= 216.

One box contain 216 candles.
So, 37 box will contain,
216 x 37
= 7992 candles.

Rough Workspace

Problem on Numbers

 

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