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Express the number 208 as a) an 8-bit binary number b) an octal string c) a hexadecimal string

Number conversions are a staple of both A-Level and GCSE computing papers. a) Expressing as a binary number is the hardest part of a conversion. Octal and hexadecimal can all come after e...

Answered by Adam M. • Computing tutor

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A school has a number of students. One is chosen at random; the probability that the student is female is 2/5. Knowing that there are 174 male students, work out the total number of students in the school.

This is a simple yet standard GCSE question, especially in non-calculator papers. The solution is simple: if the student is picked at random, then the probability 2/5 must represent a ratio where the othe...

Answered by Adam M. • Maths tutor

3958 Views

The circle C has centre A (10, 12) and passes through the point B (15, 15). a) Find the length of AB, giving your answer as a simplified surd. b) Hence write down an equation for C in the form (x+c)^2 + (y+d)^2 = r^2.

a) Given two coordinate pairs (x1, y1) and (x2, y2) you can work out the distance AB as sqrt((x1-x2)²+(y1-y2)

Answered by Adam M. • ICT tutor

1656 Views

Q: Choose a poet who reflects on the idea of change. Show how the poet explores the subject in one or more of his/her poems, and explain to what extent your appreciation of the subject is deepened.
(P) Heaney is convincing in his use of the extended metaphor, which brings to life his observation that childhood innocence must give way to adult realism. Just as the berries in...
CH
Answered by Callum H. • English tutor
1520 Views

Explain processes of erosion that occur in a river
The first erosional process that occurs in a river is hydralic action, which is where water is forced into cracks in the river bed and channel which compresses trapped air, making the cracks larger which ...
OS
Answered by Olivia S. • Geography tutor
3577 Views

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Express the number 208 as a) an 8-bit binary number b) an octal string c) a hexadecimal string

A school has a number of students. One is chosen at random; the probability that the student is female is 2/5. Knowing that there are 174 male students, work out the total number of students in the school.

The circle C has centre A (10, 12) and passes through the point B (15, 15). a) Find the length of AB, giving your answer as a simplified surd. b) Hence write down an equation for C in the form (x+c)^2 + (y+d)^2 = r^2.

Q: Choose a poet who reflects on the idea of change. Show how the poet explores the subject in one or more of his/her poems, and explain to what extent your appreciation of the subject is deepened.

Explain processes of erosion that occur in a river

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