Interactive practice questions
To test whether a number is divisible by $10$10, we use the following simple algorithm.
"If the number ends in a $0$0, then the number is divisible by $10$10."
Examine the following list of three-digit numbers and write down all the numbers that are divisible by $10$10.
Write these numbers on the same line, separated by commas.
$313,882,710,170,479,381,860,465,256,344$313,882,710,170,479,381,860,465,256,344
Examine the following list of five-digit numbers and write down all the numbers that are divisible by $10$10.
Write down these numbers on the same line, separated by commas.
$42381,92176,86498,59433,24499,21880,95534,61110,25190,39137$42381,92176,86498,59433,24499,21880,95534,61110,25190,39137
Examine the following list of seven-digit numbers and write down all the numbers that are divisible by $10$10.
Write down these numbers on the same line, separated by commas.
$6459620,5638943,2878605,1904790,5037628,6805217$6459620,5638943,2878605,1904790,5037628,6805217
To test whether a number is divisible by $2$2, we use the following simple algorithm.
"If the number is even (that is, the digit in the ones column is even), then the number is divisible by $2$2."
To test whether a number is divisible by $5$5, we use the following simple algorithm.
"If the number ends in a $0$0 or a $5$5, then the number is divisible by $5$5."
To test whether a number is divisible by $3$3, we use the following algorithm.
Step 1: Find the sum of the digits of the number.
Step 2: If the sum is a multiple of $3$3, then the number itself is a multiple of $3$3.
Use the algorithm to determine whether $34257$34257 is divisible by $3$3.