Y9 Maths End of Year Jeopardy

Number

100

What is 1/9 as a decimal?

0.1111....

200

Write √63 + √28 in the form a√b, where a and b are integers.

3√7 + 2√7

=5√7 

300

By writing each number correct to 1 significant figure, estimate the value of:

(59.8 x √103.4)÷0.185

(60 x √100) ÷ 0.2

= 3000

400

At the start of an experiment. There are 20,000 bacteria. The number of bacteria increases at a rate of 20% per hour.

After how many whole hours will the number of bacteria exceed 500,000?

31 hours

500

Simplify

(125/27)^-2/3

(Hint: Use laws of indices)

9/25

Algebra

100

Simplify

a + a + a + a + a

5a

200

Simplify

(2x² – 32) ÷ (x–4)

2(x+4)(x–4)÷(x–4)

=2(x+4)

300

Factorise fully

2x² + 7x + 3

(2x+1)(x+3)

400

Expand

(x + 1)(x + 2)(x + 3)

x³ + 6x² + 11x +6

500

Neema and Baraka went to a wholesale depot to stock up on sodas for their kiosks.

• Neema bought 3 crates of soda and 2 extra loose bottles, paying a total of Sh 56,000.

• Baraka bought 5 crates of soda, but he returned 4 empty glass bottles to get a deposit refund. His total bill came to Sh 86,000.

Find the cost of one crate of soda and the refund value of one empty bottle.

c = 18,000

b = 1,000

Geometry

100

State the formula for the area of a triangle.

A=(base x height)÷2

200

I have 4 triangular faces, 1 square face and 5 vertices.

Who am I?

Square-based pyramid.

300

A phone screen has a length of √68cm and a width of √44cm.

Work out the length of the diagonal of the screen. Give your answer as a simplified surd.

4√7

400

A circle has an area of 18 cm².

Work out its circumference to 3 sf. 

15.0cm

500

The length of a rectangle is 14m more than its width.

If the area is 51 m², find the perimeter of the rectangle.

40m

24

100

8 2 2 4

8x2= 16 | 2x4 = 8 | 8+16 =24

(Accept correct alternative method)

200

2 4 6 7 

7-4=3 | 6+2=8 | 8x3 =24

300

3 3 5 7

3x5 =15 | 15-7 =8 | 8x3 =24

400

2 7 8 9

[(7+9)x2]–8=24

500

2 3 5 12

Hint: Think outside the box

12÷[3–(5/2)]

Random

100

What is the price of a slice of pizza at Back Kitchen?

3000TZS

200

What is the minimum passing grade for Maths and English at IGCSE?

C

300

Finish the lyric:

Rise up this morning, smiled with the rising sun
Three little birds pitch by my doorstep...

Singing sweet songs of melodies pure and true
Saying, "This is my message to you-ou-ou

400

What Disney character did Ms Enid play in BISA's 2017 school production?

Jasmine

500

Where and when was the first FIFA World Cup held?

Uruguay 1930