6-7 Questions
Sum Thing Smart
Number Ninjas
100

How many 3-digit numbers are multiples of 18 and have a 6 as the ones digit?

10

100

At the Super Cup, Kaden buys keychains and hats for his friends. Each keychain cost $10 and each hat $25. If Kaden bought 8 items and spent $125, how many keychains did he buy?

5

100

Compute the product: 2 x 4 x 5 x 15 x 25

15,000

200

Sarah’s mystery 4-digit number has consecutive digits in strictly increasing order from left to right. It is also prime. What is her number?

4567

200

I am a 3-digit number.
The sum of my digits is 15.
My tens digit is 3 more than my ones digit.
My hundreds digit is twice my ones digit.

663

200

Compute the product 2 x 8 x 5 x 15 x 25

30,000

300

At Hudson High School, the first class starts at 8:26am and the fourth class ends at 11:26am. There are 4 minutes between classes and each class is the same length. How many minutes are there in one class period?

42 minutes

300

Jacob has a lucky number, and Emma wants to know it. Jacob tells Emma that if she takes his lucky number, triples it, and adds 95, the result will be 2024. What is Jacob’s lucky number?

643

300

Find the sum 1234 + 5678 + 9012 + 3456

19,380

400

Dr. Bolton was born in an interesting year. The tens digit was twice the thousands digit, the ones digit was three times the tens digit, and the hundreds digit was equal to the sum of the other three digits. In what year was she born?

1926

400

Compute the simplified numeric value of each expression: (4 × 10) + (4 × 9) + (4 × 8) + … + (4 × 2) + (4 × 1)

220

400

Compute 200 – 188 + 175 – 163 + 150 – 138 + 125 – 113 + 100 – 88 + 75 – 63 + 50 – 38 + 25 – 13

96

500

Emily is playing the video game Super Marlo Sisters. During her game, she collects 8 boxes, each of which has either a coin (worth 100 points) or a flower (worth 250 points). The total score from the 8 boxes is 1250 points. How many of Emily’s boxes have flowers?

3

500

Three brothers have the same birthday, but were born in different years. Four years ago, the oldest brother's age was 5 times the age of the youngest brother. At that time, the age of the middle brother was 3 times the age of the youngest brother. Today, the middle brothers age is twice the age of the youngest brother. Today, how old is the oldest brother?

24

500

What whole number is equal to (3 x 10 + 2 x 10) x (7 x 4 – 2 x 4)?

1000

M
e
n
u