Elementary arithmetics

9000115607

Level: 
B
Complete the following statement: „The number is divisible by nine if and only if ...”
the sum of its digits is divisible by nine.
the number constituted from the last two digits is divisible by nine.
the sum of its digits is odd.
the last digit of this number is \(9\).

9000115608

Level: 
B
Complete the following statement: „The number is divisible by ten if and only if ...”
the last digit of this number is \(0\).
the sum of its digits is divisible by ten.
the number constituted from the last two digits is divisible by five.
the last digit of this number is even.

9000115610

Level: 
B
Complete the following statement: „A number is divisible by fifteen if and only if ...”
it is divisible by both three and five.
the sum of its digits is divisible by both three and five.
the sum of its digits is odd and divisible by five.
the last digit of this number is either \(5\) or \(0\).

9000115609

Level: 
B
Complete the following statement: „A number is divisible by twelve if and only if ...”
it is divisible by three and four.
the sum of its digits is divisible by both two and three.
the sum of the digits is even and the last digit of this number is odd.
the sum of the digits is odd and the last digit of this number is even.

9000115602

Level: 
B
Complete the following statement: „The number is divisible by three if and only if ...”
the sum of its digits is divisible by three.
the number constituted from the last two digits is divisible by three.
the sum of its digits is odd.
the last digit of this number is \(3,\ 6\) or \(9\).

9000115603

Level: 
B
Complete the following statement: „The number is divisible by four if and only if ...”
the number constituted from the last two digits is divisible by four.
the sum of its digits is divisible by four.
the last digit of this number is \(4\).
the last digit of this number is even.