Algebra
Solve 3x + 5 = 20
x = 5
What is the formula for area of a circle?
pi x r2
What is the method for dividing fractions
keep, flip, change
There are 40 pens and 15 pencils in a pot. Write down the ratio of pens to pencils in its simplest form.
8 : 3
There are 5 white counters, 8 black counters and 7 grey counters in a bag. A counter is chosen at random. What is the probability that it is not white?
3/4
Factorise fully 12x + 20
4 (3x + 5)
Calculate the circumference of a circle with radius 10cm in terms of pi
Round 30.457 to 3 significant figures
30.5
Three pens cost 15p. How much do 7 pens cost?
35p
Find the median of 8, 12, 11, 15, 9, 10
10.5
Factorise x2 + 6x + 8
(x+4)(x+2)
What are the 3 trigonometry rules (including letters)
sin = o/h
cos = a/h
tan = o/a
Express 43 x 45 as a single power of 4
48
The ratio of red sweets to green sweets in a jar is 7:2. If there are 18 green sweets, how many red sweets are there?
63
The probability that a biased spinner lands on a 2 is 0.3. Jemima spins the spinner 150 times. Work out an estimate for the number of times the spinner will land on a 2.
45
Expand (2x + 1)(3x - 2)
6x2 - x - 2
13cm (using pythagoras)
Simplify rt/50
5rt/2
Amjit, Bella and Chris share $1250 in the ratio 6:8:11. Work out how much Chris receives.
$550
Three positive integers have a mean of 4 and a range of 7. Find the three numbers.
1, 3, 8
Complete the square x2 + 10x +12
(x + 5)2 - 13
What is the formula for finding surface area of a cylinder
pir2+pirl
A coin is weighed as 30 𝑔 to the nearest 5 𝑔. Find the upper bound of the weight of 10 coins
325g
The ratio of black squares to grey squares is 7:3. The ratio of white squares to grey squares is 9:5. Find the ratio of black squares to white squares in its simplest form.
Five integers have a mean of 8. The integers are 7, 3, 10, 13, 𝑥. Find the value of 𝑥.
7