Q229
The number 1422 - 1 is divisible by :
A.
19
B.
7
C.
9
D.
13
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
= 1422 - 1= (142 - 1) (142 + 1) [a2 - b2 = (a - b) (a + b)]
= 141 × 143
= 141 × 11 × 13