Natural numbers 7th grade

A number is a multiple of 3 if ...

• ...the sum of its digits is a multiple of 3.

• ..the sum of its digits is 3.

• ...it ends in 3, 6 or 9.

• None of the above

A number is a multiple of 5 if…

• …it ends in 5.

• …the sum of its digits is a multiple of 5.

• …it ends in 0 or 5.

• None of the above

Indicates the multiples of 2

• 115; 112; 4; 12

• 48; 252; 100; 300

• 33; 801; 990; 17

• None of the above

Indicate the multiples of: 3

• 801; 33; 48

• 100; 990; 115

• 671; 300; 194

• None of the above

How can you decompose these numbers into factors?: 24 & 198

• 2³ · 3 & 2 · 3² · 11

• 2³ · 3² & 2² · 5 · 11

• 2³ · 3² & 2³ · 5 · 11

• None of the above

Calculate: GCD (30, 45)

• 15

• 45

• 150

• None of the above

Calculate: LCM (84, 90)

• 900

• 1260

• 315

• 60

Knowing that: a = 2³ · 3² · 11 & b = 2 · 3⁴. Calculate: LCM (a, b)

• 7128

• 891

• 7318

• None of the above