STD VI - Math (III)

Name
Class
ITS ID
Additive identity of whole numbers is _____________.
A) 1
B) 0
C) -1
D) none of these
17 is one of the factors of 68.
A) True
B) False
Addition of two prime numbers always gives a prime number.
A) True
B) False
Which of these are not a prime number?
A) 81
B) 61
C) 47
D) 97
What is the value of 25 x 1010 x 4?
A) 10100
B) 1010
C) 101000
D) 10101
Is 3456128 divisible by 8?
A) Yes
B) No
4539 is divisible by ____________.
A) 2
B) 3
C) 4
D) 6
The LCM of 28, 36 and 40 is __________.
A) 280
B) 1520
C) 72
D) 2520
1 is the smallest prime number.
A) True
B) False
Which of the following is a pair of co-prime?
A) 14, 18
B) 15, 16
C) 16, 32
D) 3, 5
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