LCM and HFC

1 ) LCM & HCF | Online Mock Test Series General Aptitude Free Exam

The LCM of two numbers is 864 and their HCF is 144. If one of the number is 288, the other number is:

432

576

478

532

327

View Solution

Answer :

Required number = (LCM x HCF) / First number
= (864 x 144) / 288
= 432

2 )

LCM of two numbers is 225 and their HCF is 5. If one number is 25, the other number will be:

175

205

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Answer :

LCM × HCF = 1st Number × 2nd Number
=> 225 × 5 = 25 × x
Therefor x = (225 x 5) / 25 = 45

3 )

The L.C.M. of two numbers is 1820 and their H.C.F. is 26. If one number is 130 then the other number is:

154

657

524

1044

364

View Solution

Answer :

Given that
L.C.M. of two numbers = 1820
H.C.F. of those numbers = 26
One of the number is 130
Therefor Another number = (1820 x 26) / 130
= 364

4 )

The LCM of two numbers is 1920 and their HCF is 16. If one of the number is 128, find the other number.

204

120

345

240

548

View Solution

Answer :

We have,
First number × second number
= LCM × HCF
Therefor Second number
= (1920 x 16) / 128
= 240

5 )

The HCF of two numbers 12906 and 14818 is 478. Their LCM is

400086

200043

600129

800172

700172

View Solution

Answer :

Product of two numbers = HCF × LCM
= 12906 × 14818
= LCM × 478
=> LCM = (12906 x 14818) / 478
= 400086