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Grade 8 - Mathematics
5.23 Number Theory Review Test

Q 1: If A and B are two natural numbers and L and G are their L.C.M. and G.C.D. then relation between these four is A*B = L*G. (True/False)
False
True

Q 2: If a and b are co-primes their G.C.D. = ____.
1
2

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

Q 4: The number of factors of 72 is _____.
12
10

Q 5: The sum of the first 10 odd numbers is ____.
100
150

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

Q 7: G.C.D. means greatest common divisor. (True/False)
True
False

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

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Question 10: This question is available to subscribers only!


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