Mathopardy

Integers, powers & roots

100

Mental Math

-30 : -5 =

6

200

Mental Math
-9--9

0

300

Square root of 169

13

400

2⁶

64

500

If A^B=B^A, what are the numbers for A and B?

A=4, B=2, or vice verse

Sequences & formulae

100

What should be instead of "*" in the sequence?

2, 5, *, 11, 14, 17

8

200

What is the term-to-term rule in the sequence?
30, 28, 26, 24, 22

Subtract (minus) 2

300

y=(5x-1):3

Find output (y) when the input (x) = 2

y=3

400

The math teacher had an "x" number of McDonald's vouchers. Three of them he/she used during the weekend and then half of the rest he/she gave to students. What number of vouchers does the teacher have now? (say as an expression)

(x-3):2

500

The fourth term of a sequence is 39, the term-to-term rule is: "add 7". What is the first term of a sequence?

18

Factors, multiples, primes

100

Find all factors of number 10

Factors: 1, 2, 5, 10

200

List first four multiples of 6

6, 12, 18, 24

300

What does HCF & LCM stand for?

HCF - highest common factor

LCM - lowest common multiple

400

Name all prime numbers less than 12

2, 3, 5, 7,11

500

HCF (45, 75) -?
LCM (12, 60) -?

HCF = 15

LCM = 60

Shapes, perimeter, area

100

How do we call a shape with 4 equal sides and 4 equal angles?

Square

200

How do we call a triangle with only 2 equal sides?

Isosceles triangle

300

The perimeter of the rectangular fence is 40 m. Find the width, if the length = 15 m.

5 m

400

What is the area of a circle with a diameter = 24 cm? Give your answer in terms of "pi".

S=144*pi cm²

500

What is the area of this shape? https://jamboard.google.com/d/1rnqJyjboR2O0sbj3CqGHK-6Yv6V9Dk82U3df5qbBgnk/edit?usp=sharing

55

Fractions vs decimals

100

What number is larger?
0,043 or 0,05

0,05

200

Round the number to 2 d.p.

64,2368

64, 24

300

Express fraction as a decimal:

4/5

0,8

400

5/6 : 2/3

5/4=1 1/4

500

One-half of the students in a school are girls, and 3/5 of these girls are studying in lower classes. What fraction of girls are studying in lower classes?

3/10

Equations & expressions

100

Simplify:

2y+8y-y

9y

200

Solve the equation:

4a+1=17

a=4

300

Expand the parentheses:
2n(4n+6n²)

8n²+12n³

400

Collect like terms:

4x²+3x²+8x-3x

7x²+5x

500

Link for an equation:

https://jamboard.google.com/d/1aAivzcEOo4760uxi4swPLI-UbOuoCT1-BSOExauTt1k/edit?usp=sharing

16

Black box

100

Is 1 a prime or composite number?

Neither a prime, nor composite.

200

A family has five sons, and each of them has a sister. How many kids does a family have in total?

The family has six kids – five sons have one common sister.

300

What if I say that you can multiply any number by another one and get the same answer? What is this number?

It’s zero. Multiplying anything by 0 = 0.

400

How to write this shorter (as a power of m and e): 

memememe

m⁴e⁴ or (me)⁴

500

If Mr.Spynn is 90 cm plus half his height, how tall is he?

180 cm