Question

MCQ
1. if P,P +2,P+4 are prime numbers then P=_______
a. 5 b.3 c. 29 d. 191
2. if HCF ( x , y ) =1 then HCF ( x-y ,x -y )=______
a. 4 b. 1 or2 c. x or y d. x + y or x - y
3. (1) + (1+1) + ( 1+1+1)+,.......+(1+1+1+1)........+(n-1) or 1+2+3+.....+(n-1) (1+1+1+1....(n-1) terms
a. n (n-1) /2 b. n(n+1)/2 c. n d. n*2

Answer 1

Answer:

1. b. 3 is the correct answer

Answer 2

Answer:

1. option b

2. option b