Solution
For the numbers of the form : $$x$$ $ $$y=(x-1)\times(y-1)$$
Eg :- $$(14-1)\times(8-1)=(13\times7)=91$$
and $$(18-1)\times(4-1)=(17\times3)=51$$
Similarly, $$(21-1)\times(9-1)=(20\times8)=160$$
=> Ans - (A)
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
