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Grade 8 - Mathematics
5.23 Number Theory Review Test

Q 1: If G.C.D. of a and b is x, then G.C.D. of ma and mb is ____ given a, b and m are natural numbers.
mx
max

Q 2: The sum of any two odd numbers is _____.
Even number
Odd number

Q 3: 29 and 39 examples for twin primes.(True/False)
False
True

Q 4: Every composite number has ___ factors.
2
At least 3

Q 5: 2,4,6,8,.... are divided by 2 then the remainder is _____.
0
1

Q 6: If p and q are two numbers and r is G.C.D. then L.C.M. = (p.q/r).(True/False)
False
True

Q 7: The sum of two odd numbers is an ___ number.
Even number
Odd number

Q 8: Two numbers are relatively prime if their G.C.D. is 1. (True/False)
False
True

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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