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LB page 144 number 1: Which of these numbers is divisible by 3? 935; 9203 ; 43 719
43719 because the sum of the digits is divisible by 3 (4+3+7+1+9=24)
LB 144 number 3: Jiao is thinking of a number. She says "My number is between 50 and 100. It is divisible by 3 and 4. The tens digit is double the ones digit. What number is it?.
84
LB 144 number 6: Put these numbers in the diagram
div by 6= 24; middle=36; div by 9= 27; div by 3= 21; outside= 16
LB 145 number 8: Oscar is thinking of a number. He says, "My number is between 200 and 220. It is divisible by 6. The sum of the digits is 3". What number is it?
210
WB page 134 number 1: Which of these numbers are divisible by 3: 4563 ; 54 689; 234 567
4563 and 234567 because the sum of the digits is divisible by 3
WB 134 number 2a: Write a digit inside 7 and 23 ( 7.. 23) that is divisible by 3
7023 or 7323 or 7623 or 7923
WB 135 number 4: Here are five numbers: 64 ; 128 ; 240 ; 352 ; 424. Are they ALL divisible by 5?
NO
WB 135 number 4: Here are five numbers: 64 ; 128 ; 240 ; 352 ; 424. Are they ALL divisible by 6?
NO
WB 135 number 4: Here are five numbers: 64 ; 128 ; 240 ; 352 ; 424. Are they ALL divisible by 8?
YES
WB 135 number 4: Here are five numbers: 64 ; 128 ; 240 ; 352 ; 424. Are they ALL divisible by 9?
NO
WB 136 number 7: Multiples of 6 can never end in a 3. Is he right? (note: the last digit is never 3)
Yes. Multiples of 6 must be even and a number ending in 3 is odd.
WB 136 number 8: Use digits 1 ; 2; 5; 7 to make 3-digit numbers divisible by 3
Many possible answers including 171 (divisible by 3)
