Question

4. Raj has an unlucky number and he hates it. So, whenever he sees that number anywhere, he strikes the number with a pen so that no one can see that number. You opened his mathematics textbook and saw this

Answer 1

Here Raj cut the unit digit of a set of two digit nos 1x,7x

1x => 1×10+x =10+x

7x=> 7×10 +x= 70+x

It is given

1x/7x= 1/6

SO (10+x)/(70+x) =1/6

60+6x=70+x

5x=10

x=2

Since x is the no which Raj had cut we can say Raj's unlucky number is 2

MARK AS BRAINLIEST