All possible two factor product are formed from the numbers 1,2 200 The number of - Maths - Relations and Functions

Question

All possible two factor product are formed from the numbers 1,2 200
The number of factors out of the total obtained from the multiples
of 5 are ??

Decoder_7 · Accepted Answer

hello,
Two factor product which are multiple of 5=(total two factor
products)-(two factor product of non multiples of 5)
total two factor products=200c2=19900
two factor product of non multiples of 5=60c2=1770
final answer=18,130
regards,ambika

All possible two factor product are formed from the numbers 1,2....200 . The number of factors out of the total obtained from the multiples of 5 are.??