Question

Which of the following is incorrect? 

(i) (-55) x (-22) x (-33) < 0 

(ii) (-1521) x 2511 < 0 

(iii) 2512 – 1525 < 0 

(iv) (1981) x (+2000) < 0

Answer 1

(iii) and (iv) are incorrect because 2512 – 1252 is a positive integer. 

Also (+1981) x (+2000) is a positive integer.