Integer Math

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.

Which of these is divisible by 10?

• 8105

• 375

• 460

• 52

Which of these is divisible by 6?

• 318

• 215

• 7000

• 4765

Is 1,284,604 divisible by 2?

• Yes, because the sum of the digits is 20, which is an even number

• No, because 4 is an odd number

• Yes, because 4 is an even number

• No, because the it is not divisible by 3

All of these numbers are divisible by 5 except for...

• 75,395

• 984,940

• 222,222,235

• 8,943,892

Tell whether 432 is divisible by 2, 3, 4, 5, 6,  9, 10

• 2, 3, 4, 6, 9

• 3, 6, 9

• 2 and 4 only

• 2, 3, 4, 5, 6, 9, 10

Which one is a prime number?

• 465

• 822

• 600

• 743

-6 ÷2

• 3

• 12

• -3

• 3

Which is the greatest integer out of the following?

• -33

• -31

• -28

• -17

Which is the least positive integer?

• 1

• -1

• 2

• 0