Y8 Maths Chapter 1 Jeopardy

Prime Number?

100

Is 244 prime? If no, how do you know?

No. 44 is a multiple of 4, so 244 is not prime

200

Is 53 prime?

Yes

300

Is 309 Prime?

No - 3+0+9=12 = multiple of 3

400

Prime or not prime: Number of planets in the solar system, NOT INCLUDING EARTH

8 planets - Earth = 7 -> PRIME!

500

(901 / 53) + 3. Prime or not?

901/53 = 17

17+3 = 20

Not prime

Prime Decomposition

100

prime decomposition of 100

2² x 5²

200

Prime decomposition of 36 x 80

(2 x 3 x 2 x 3) x (2 x 2 x 2 x 2 x 5)

= 2⁶ x 3² x 5

300

prime decomposition of 365

5 x 73

400

prime decomposition of 1344

2⁶ x 3 x 7

500

Prime decomposition of 111111

3 x 7 x 11 x 13 x 37

LCM /HCF

100

HCF of 240 and 540

60

200

LCM of 3 and 53

159

300

HCF of 390 and 880

10

400

LCM of 135 and 192

8640

500

HCF AND LCM of 126 and 588

HCF: 42

LCM: 1764

Index Laws

100

a⁴ + a⁴

2a⁴

200

b⁵ x b³

b⁸

300

c¹⁸ / c⁶

c¹²

400

(d⁵² x d^-20) / d³⁰

d²

500

((e⁴)⁵ x f³)/(e¹³ x f)

e⁷ x f²

Square Roots

100

What is the squareroot of 81?

9

200

What is the cube root of 27?

3

300

Squareroot of 625

25

400

Cube root of 343

7

500

(Squareroot of 10000 + Cube root of 729 + 1) / 11

10