Download COUNTING NUMBERS

COUNTING NUMBERS
QUESTION 1 [13]
The number 36 is given.
1.1
Write down the multiples of 36.
(2)
1.2
Write down all the factors of 36.
(2)
1.3
Calculate
1.4
Write down all the factors of 36 that are complete squares.
(2)
1.5
Write down the prime factors of 36.
(2)
1.6
Write 36 as the product of its prime factors.
(2)
1.7
Write down all factors of 36 that are composite numbers.
(2)
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(1)
QUESTION 2 [10]
State whether the following statements are true or false:
2.1
−6 ÷ 0 = 0
(1)
2.2
16632 is divisible by 2 ; 3 ; 4 and 6
(1)
2.3
2 is the only even prime number
(1)
2.4
prime numbers are only divisble by one and themself
(1)
2.5
the multiplication inverse of 9 is −9
(1)
2.6
16 is the square of 4
(1)
2.7
all natural numbers are counting numbers
(1)
2.8
1 is the only composite number
(1)
2.9
the LCM of 8 and 12 is 48
(1)
2.10 The HCF of 160 and 90 is 30
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(1)
QUESTION 3 [6]
3.1
Which of the following numbers are divisble by 11?
275; 913; 444; 4444; 8272; 3894
(2)
3.2
By which numbers is 1236 divisble?
(2)
3.3
Is 12 983 divisible 3? Show your calculations.
(2)
TOTAL: 30
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