Problems on Numbers Shortcuts
Model 1 :
- If two-third of one-fifth of three-seventh of a number is 4, what is the number ?
- 60
- 70
- 75
- 80
- None of these
Solution :
Given that two third (2/3) of one fifth (1/5) of three seventh (3/7) of a Number is 4.
Say that number is x, So
(2/3)×(1/5)×(3/7) x = 4
=> x = 70
Practice Problems on Model 1 :
- If three-fourth of four-ninth of three-fifth of a number is 16, what is the number ?
- 60
- 70
- 75
- 80
- None of these
- If three-seventh of seven-ninth of three-fourth of a number is 15, what is the number ?
- 60
- 70
- 75
- 80
- None of these
- If two-ninth of nine-fourteenth of 2 1/3 times of a number is 25, what is the number ?
- 60
- 70
- 75
- 80
- None of these