Question

which the following groups shows that product of three numbers are same even when grouping of the number is changed


a) 31×19=19×31

b) (15×9)×14=15×(9×14)

c) 1547×1=1547​

Answer 1

Answer:

Correct option is

A

85

All three numbers are co-prime to each other, So the common factor is 1.

Product of the first two numbers=551

Product of the last two numbers=1073

HCF of 551 and1073 is the middle number.

Middle number,HCF(551,1073)=29

First number=

29

551

=19

Last number =

29

1073

=37