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Elementary School: 3rd, 4th & 5th Grade
Math
Properties Of Numbers 2
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Q.1
What is the smallest prime number?
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2
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1
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0
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-1
Q.2
Which number is the odd man out: 71, 17, 11, 39?
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11
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17
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39
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71
Q.3
For those of you with stamina: How many prime numbers are there between 1 and 100 inclusive?
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29
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26
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27
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25
Q.4
Which of the following statements is wrong?
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Two is an even number and a prime number
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Other than the number 2, there are no even prime numbers
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If you add two odd numbers, you get another odd number
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If you add two even numbers, you get another even number
Q.5
Which of the following statements is wrong?
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13 is an odd number
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13 × 13 = 159
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13 is a prime number
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13 is the sixth smallest prime number
Q.6
How many prime numbers are there between 1 and 30?
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10
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12
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11
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9
Q.7
Which number is the odd man out: 49, 15, 41, 9?
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9
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15
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49
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41
Q.8
Which of the following statements is wrong?
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If a number is divisible by 9, then it is divisible by 3
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If you add two prime numbers together, you get another prime number
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If you subtract 1 from an even number, you get an odd number
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There are four prime numbers between 1 and 10
Q.9
Which two prime numbers have to be added together to give 38?
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11 + 27
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19 + 19
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23 + 15
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29 + 9
Q.10
Which number is the odd man out: 64, 32, 144, 100?
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144
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64
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100
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32
Q.11
What is a prime number?
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A number that is only divisible by 1 and itself
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A number that cannot be squared
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A whole number that divides into another whole number
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An odd number that is divisible by 3
Q.12
How can we recognize if a number is divisible by 6?
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A number is divisible by 6 if it is odd and divisible by 3
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A number is divisible by 6 if it is even and divisible by 3
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A number is divisible by 6 if the sum of its digits total 3
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A number is divisible by 6 if it is even and divisible by 2
Q.13
Which is the smallest common multiple of 6 and 15?
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2
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3
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5
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6
Q.14
How can we recognize if a number is divisible by 3?
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A number is divisible by 3 if it is an odd number
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A number is divisible by 3 if it ends in 3
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A number is divisible by 3 if the sum of its digits is divisible by 3
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A number is divisible by 3 if it is a square number
Q.15
How can we recognize if a number is divisible by 25?
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A number is divisible by 25 if it ends in 00, 25, 50 or 75
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A number is divisible by 25 if it is divisible by 8
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A number is divisible by 25 if the last two digits are divisible by 8
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A number is divisible by 25 if it is odd and divisible by 3
Q.16
How can we recognize if a number is divisible by 8?
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A number is divisible by 8 if it is a square number
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A number is divisible by 8 if it ends in 2 or 4
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A number is divisible by 8 if the last two digits are divisible by 8
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A number is divisible by 8 if the last three digits are divisible by 8
Q.17
How can we recognize if a number is divisible by 9?
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A number is divisible by 9 if it is an odd number
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A number is divisible by 9 if the sum of its digits is divisible by 9
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A number is divisible by 9 if the last two digits are divisible by 4
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A number is divisible by 9 if the sum of its digits total 3
Q.18
What is the next prime number after 7?
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9
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11
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13
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27
Q.19
What is 15 squared?
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150
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175
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225
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250
Q.20
Which are the factors of 24?
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1, 2, 3, 4, 6, 8, 12, 24
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2, 3, 4, 6, 8, 12
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1, 2, 3, 4, 5, 8, 12, 24
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1, 2, 4, 6, 12, 24
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