28. What is the difference between prime numbers which
is less than 50 but greater than 10?
29. What is the multiplication of prime number from 1
to 10?
30. What is the multiplication of prime number from 1
to 15?
31. What is the summation of prime number from 1 to
12?
32. If the sum of the digits of a number is divisible
by 3, then the number is also divisible by -----------
33. If the sum of the digits of a number is divisible
by 9, then the number is also divisible by -----------
34. If any number has 0 or 5 digits in its ones place,
then the number will be divisible by ----------------
35. If the digits of the one's place of a number is
zero or an even number, then the number is divisible by --------------
34. If any number formed by the digits of ones and
tens place of the number is divisible by 4, then the given number will be divisible
by ---------------
35. If the number of both tens and one's place is zero,
then the number will be divisible by ---------------
36. At least how much is to be added to 2458 to get
the sum divisible by 9?
37. At least how much is to be added to 2458 to get
the sum divisible by 3?
38. At least how much is to be added to 2458 to get
the sum divisible by the single greatest number?
39. How many factors has 17 and why?
40. If any number is divisible by 9, then the number
is also divisible by --------------
41. Which is a unique place a number divisible by 5?
(a) 0
(b) 2 (c) 5 (d) 0 or 5.
42. Which is a pair of co-prime numbers? (a) 15, 25 (b)
19, 38 (c) 22, 27 (d) 8, 20
43. How many prime numbers from 15 to 50?
44. L.C.M. of two prime numbers is
-------------------------------------------
45. Which one of the following are co-prime pairs?
(a) 12,18 (b)
19,38 (c) 22,27 (d) 28,35
46. How many prime numbers are there from 1 to 30?
(a) 4 (b)
6 (c) 9 (d) 10
25. What is the H. C. F of two prime numbers? (i) 1
(ii) 2 (iii) 3 (iv) 4
37. Which of the following is a
prime number?
(a) 1 (b) 2 (c) 4 (d)
15
42. Summation of prime number from 10 to 60 in which
ones place value 9-
(i) 97 (ii)
107 (iii) 117 (iv) 157
44. If two
numbers are coprime numbers, what is their H.C.F?
47. How many prime number from 20
to 70? (i)
8 (ii) 9 (iii) 10
(iv) 11
49. Which one pair is Co-prime? (i) 12,18 (ii)
19, 38 (iii) 22, 27 (iv) 28,35
50. The average of the prime numbers from 1 to 10
is------------------------------------
52. If a and b are prime number then their L. C. M
is-------------------------------------
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