HCF LCM Word Problems

Melanie and Martin are both building a toy train track out of connecting pieces. Melanie has pieces that are 8 inches long while Martin's pieces are 20 inches long.  How long will the shortest track be that they can each build with the same length?

• 2
• 40
• 4
• 20

Tags

CCSS.6.NS.B.4

Two neon signs are turned on at the same time. Both signs blink as they are turned on. One sign blinks every 9 seconds. The other sign blinks every 15 seconds. In how many seconds will they blink together again?

• 48 seconds
• 45 seconds
• 16 seconds
• 8 seconds

Tags

CCSS.6.NS.B.4

Which are factor pairs of 45?

• 1,45,5,9

• 1,3,7,9

• 5,7,8,9

• 7,9,5,2

Tags

CCSS.4.OA.B.4

•The HCF of X and Y is M. Which of these is true?

• M > X

• M > Y

• M = XY

• M < X

Tags

CCSS.6.NS.B.4

Three bells toll together at the same time after the first bell stays quiet for 12 seconds, the second bell for 15 seconds and the third bell for 18 seconds. During a duration of 30 minutes, how many times will the three bells toll together?

• 10

• 11

• 12

• 15

Tags

CCSS.6.NS.B.4

what is the divisibility rule for 4

• Last two numbers divisible by 4

• Last 3 numbers divisible by 4

• Add all of the digits and divide by 4

• Even number

Which number is divisible by 6

• 1782

• 1213

• 536

Tags

CCSS.5.NBT.B.6

Which number is divisible by 9

• 345

• 8522

• 98874

The divisibility rule for 11 is...

• Divide the whole thing by 11

• Multiply the digits together by 11

• If the difference of the sum of its digits in odd places and the sum of it digits in even places,(starting from the unit's place) is divisible by 11

• add the digits together. If the sum is divisible by 11, the original number is divisible by 11

Is 9020814 is divisible by 11 or not

• Yes,it is divisible by 11

• No,it is not divisible by 11

Tags

CCSS.6.NS.B.2