Search our library of GCSE questions

Top answers

All subjects

GCSE

The first floor of an ancient japanese tower has 150 steps. Each floor above has 5 fewer floors than the previous. So, the second floor has 145 steps, the third 140 etc. How many floors does the tower have if the final floor has 30 steps leading to it.

Note this is an arithmetic series problem, so we use the equation: x_n= a + d(n-1).
Number of steps on the first floor is 'a', i.e. a = 150.
Difference in the number of steps on each ...

Answered by Joel F. • Maths tutor

3214 Views

How do I remember the differences between the the two tenses; the imperfect and preterite?

This is the way I always remember the difference. The preterite tense is the past. The imperfect tene is the ongoing past. The preterite tense means that an action in the past has finished. For example, ...

Answered by Clara B. • Spanish tutor

2783 Views

Describe mitosis as part of the cell cycle

Define mitosis: a process of cell division where a single cell splits into two identical daughter cellsWhen does it occur? When the body requires more cells for growth.The overall process has 5 steps.Inte...

Answered by Chloe T. • Biology tutor

4579 Views

The ratio of Adam's age to Bob's age is 1:2. In 12 years time, the ratio of their ages will be 3:5. Calculate their current ages.

Now: In 12 years:A:B A:B1:2x:2x x+12:2x+12 = 3:5
x+12 = 2x+123 55(x+12) = 3(2x+12)5x + 60 = 6x + 36x = 24
A:B Adam = 24, Bob = 48x:2x24:2(24)24:48

Answered by Aaron S. • Maths tutor

4894 Views

Simplify: 2x + 6y + 2y - x

Step 1) Rearrange the equation as follows: (2x - x) + (6y + 2y) this makes it easier to see which values you can add together.Step 2) Solve the calculation in each bracket: x + 8y. Successfully simplifyin...

Answered by Benjamin L. • Maths tutor

3662 Views