Mental Math
Vocabulary
Fun Facts
Riddles
Other
100

What is (81 ÷ 9) + 5?


14

100

What is the answer to a multiplication problem called?

Product

100

What Roman tool helped with calculations?

Abacus

100

You bought 3 packs of pencils with 6 pencils each. How many pencils do you have?

18

100

What is 1/2 of 10?

5

200

What is (39 + 24) - 16?

47

200

What do you call a number with no fractional part?

Whole Number

200

What tool did ancient Egyptians use to measure fields?

Rope With Knots

200

I’m a number. Double me and add 8, and you get 20. What number am I?

6

200

How many days are in a week?

7

300

What is (12 x 6) ÷ 4?

18

300

What is a number that is being multiplied called?

Factor

300

Which mathematician helped put a man on the moon?

Katherine Johnson

300

What three-digit number has digits that add up to 6, and the middle digit is 0?

105

300

How many hours in a day?

24

400

What is (23 x 4) + 2²?

96

400

What do you call the number left over in division?

Remainder

400

Who was the first woman to win a Fields Medal in mathematics?

Maryam Mirzakhani

400

If the sum of a number and its square is 90, what is the number?

9

400

What shape is a stop sign?

Octogon

500

What is (144 ÷ 12) + √81?

21

500

What is a number that is divided by another called?

Dividend

500

What is the oldest known mathematical artifact?

The Lebombo bone

500

A triangle has two angles of 60 degrees. What is the third angle?

60

500

What is the sum of the angles in a triangle?

180

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