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WorksheetsBasics of Maths
Total questions: 19
Worksheet time: 14mins
Which of the following are a set of twin-primes?
11 and 13
20 and 22
8 and 10
14 and 16
_____is the only even prime number.
22
8
16
2
What is the divisibility rule for 3?
Add up the digits. The sum must be even and divisible by 3.
The digits must add up to 9.
The last digit must be a 3.
Add up the digits. The sum must be divisible by 3.
Numbers that are not prime are called ______ numbers.
natural
composite
whole
twin-primes
Which of the following are the multiples of 8?
8,16,24,30,42
0,8,16,24,32......
What is an integer?
Any number(positive , negative , or zero)that is NOT a fraction or a decimal.
Any positive number , including zero , that is NOT a fraction or a decimal.
ERATOSTHENES SIEVE METHOD was devised about _____ years ago by a Greek mathematician whose name was ______.
2000,Eratosthenes
2500,Sieve
A composite number only has two factors.
TRUE
FALSE
0 is an natural and whole number.
TRUE
FALSE
A number is divisible by 10 if
It is even.
It ends in 0.
It ends in 0 or 5.
The sum of the digits is a multiple of 10
Which of the following are the factors of 8?
1,2,4,8
1,2,3,4,8
21 is an odd , natural , whole and composite number.
TRUE
FALSE
Which of the following is a prime number?
12
14
19
16
17 is an odd and prime number.
TRUE
FALSE
There is no limit to the number of multiples of a number.
TRUE
FALSE
Which of the following is a set of co-primes?
4,9
3,6
252 is divisible by 9 because:
The digits add up to 18.
The sum of the digits is divisible by 9.
It's even and the sum of the digits is divisible by 3.
The sum of the digits is even
Which of the following is the smallest factor of a number
1
2
What is the divisibility rule for 5?
The digits must add up to 10.
The last digit needs to be a 5 or 0.
The last digit can only be a 5.
The sum of the digits need to be divisible by 5.
