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1
Numbers which are not divisble by any other number except 1 and the number itself are called _____________
Co- prime
Prime number
Composite number
Odd prime
2
Number of prime numbers between 50 to 60 is:_________________ .
3
4
Choose the co-prime numbers from the following pairs.
7 and 63
36 and 25
35 and 21
63 and 81
An example for twin primes is:
5, 11
3, 5
11, 17
3, 7
5
Find the even number from the following numbers.
1231, 8989, 889, 14546
1231
8969, 14546
14546
8989
6
23 and 24 are co-prime numbers or not?
True
False
Not sure
None of these
7
Which of the following numbers are odd numbers?
123, 1254, 5252, 2233
123, 1254
123, 2233
2233
5252, 2233
8
Which of the following pairs are co-prime?
18 and 35
15 and 37
30 and 415
both A and B
9
The smallest composite number is __________.
10
In a two-digit number,the digit in the units place is four times the digit in the tens place and sum of the digits is equal to 10. Find the number.
32
14
37
28
11
The smallest and largest three digit odd number are __________________
101,997
101, 999
100, 998
101, 998
12
Set the three consecutive prime numbers is called a prime triplets, which of the following is a prime triplet?
2, 4, 5
7, 9, 13
5, 7, 11
2, 3, 8
13
The sum of the digit of a 2-digit number is 8. If the number obtained by interchanging the digits is 36 more than the original number. Find the number?
26
25
85
56
Which of the following is/ are a twin primes pairs:
(11,13) and (17,19)
(71, 73) and (59, 61)
(29, 31) and (41, 43)
All of these
15
__________________ are 5 consecutive composite numbers less than 100 so that there is no prime number between them .
89, 91, 93, 95, 97
90, 92, 94, 96, 98
91, 92, 93, 94, 95
16
__________________ are 7 consecutive composite numbers less than 100 so that there is no prime number between them .
90,91, 92, 93, 94, 95, 96
86, 88, 90, 92, 94, 96, 98
91, 92, 93, 94, 95, 97, 99
17
__________________ are 3 consecutive composite numbers less than 100 so that they are co-prime number.
91, 93, 95
92, 94, 96,
91, 92, 93
18
Consider the following statements.Which of the above statement (s) is /are correct?
(i) Every prime is odd.
(ii) Product of any two prime numbers is odd.
Only (i)
Only (ii)
Both (i) and (ii)
Neither (i) nor (ii)
19
Find the product of the values of the literal (a) in 325, (b) in 526 and (c) in 987 when the general form is .
42
20
Which is the smallest and largest odd prime number in between 24 and 60 ?
27,57
29,57
29,59
27,59