Wednesday, 21 March 2018

WORD PROBLEMS 1


The sum of four consecutive numbers is 1358. Find the 3rd number.

Solution

Let the numbers be as shown in the table below

1st number
2nd number
3rd number
4th number
TOTAL
n
n+1
n+2
n+3
1358

Then, n + (n+1) + (n+2) + (n+3) = 1358

4n + 1+2+3= 1358

4n + 6 = 1358

4n = 1358 – 6

4n = 1352 

4n = 1352
 4        4

n = 338

3rd number = n +2

                   = 338 + 2

                   = 340

Hence the 3rd number is 340

TRY THIS………………….. 


The sum of four consecutive numbers is 426. Find the largest number.  


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