Quiz : Playing with Numbers

There are 10 questions in this quiz. Answer all the questions and comment how many you got correct with something about yourself.

L.C.M. of 20, 25 and 30 is

100
300
600
400


H.C.F. of 120, 180 and 240 is

20
40
60
120


Smallest prime number greater than 47 is

49
51
53
55


The only even prime number is

6
2
4
0


The least prime number greater than 100 is

101
111
123
147


H.C.F. of two consecutive numbers is always

1
2
0
4


Which of the following is a pair of twin prime ?

(5,7)
(13,19)
(53,56)
(91,93)


234560 is not divisible by

5
2
3
4


H.C.F. of 22,44 and 88 is :

22
44
88
1


The prime factorization of 48 is :

2✖2✖2✖2✖3
3✖3✖2✖2✖2
2✖4✖3
8✖3✖3