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1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
Which of the following is not a composite number?
4
6
7
8
2
Which of the following pairs are twin primes?
(19, 21)
(29, 31)
(39, 41)
All of these
3
An example for twin primes is:
5, 11
3, 5
11, 17
3, 7
Number of prime numbers from 1 to 50 are:
18
12
15
20
5
Which of the following numbers are odd numbers?
123, 1254, 5252, 2233
123, 1254
123, 2233
2233
5252, 2233
Which of the following pairs of number are co-primes?
11, 111
22, 222
12, 36
14, 50
Choose the co-prime numbers from the following pairs.
7 and 63
36 and 25
35 and 21
63 and 81
The prime number which comes just after 43 is:
49
45
47
none of these
9
Consider the following statement :
i. The product of two composite numbers remains same on changing their order.
ii. The product of a pair of co-primes is changed on changing their order.
only i is true
i is false but ii is true
Both i and ii are true
Neither i nor ii is correct
10
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
11
Which of the following statement is false?
(i) An even number is always divisible by 3.
(ii) Even numbers leaves remainder 0 when divided by 2.
(iii) Product of two even numbers is always even.
(i), (ii)
(ii),(iii)
(i)
(iii)
Identify the twin primes pairs:
(19, 21) and (9, 11)
(29, 31) and (17, 19)
Both A and B
13
The smallest and largest three digit odd number are __________________
101,997
101, 999
100, 998
101, 998
14
The smallest composite number is __________.
The largest 4-digit even number and smallest 4-digit odd number are respectively ____________________
1000 and 9999
9998 and 1001
1001 and 9998
9999 and 1000
16
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)
17
If p is the prime number that (p+2) is also a prime number , then p(p+2)+1 is always ___________________
A prime number
An odd integer
Not a perfect square
A perfect square
Simplify the expression 9a + 2b + c using the values of the literal (a) in 259, (b) in 726 and (c) in 687 when the general form is .
32
29
42
19
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 sum of the number and the number obtained after interchange ?
26
25
88
62
Number of pairs of twin prime numbers between 1 and 50 are ______________