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What is the purpose of RAM in a computer?

The main purpose of RAM (Random Access Memory) in a computer is to provide fast access to volatile memory.This memory is loaded out of the primary storage device (Hark Drive or Solid State Drive) when the CP...
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Answered by Luke B. • Computing tutor
2417 Views

What is the difference between let and var when declaring variables in javascript?

Both let and var create mutable (re-assignable) variables in JavaScript. Both follow the same initalisation pattern as well:var a = 123;let a = 123;The difference between let and var comes down to something ...
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Answered by Luke B. • Javascript tutor
1725 Views

There are 5 girls, 6 boys and some adults in a classroom. The probability that a girl is chosen is 1/3. What is the probability of an adult being chosen?

This is a question taken straight out of an Edexcel exam paper. I think it's a good test of GCSE level probability and algebra. We don't know how many adults there are to begin with so let's say n = number o...
JM
Answered by Jack M. • Maths tutor
10275 Views

John is n years old where n is an whole number. Kim is three years younger than John and Vanessa is half of Kim's age. Write an expression for Vanessa's age in terms of n.

Just to make things easier to write I will be using some letters to mean things.I will write:J = John's ageK = Kim's ageV = Vanessa's age.So John is n years old so John's age is n --> J = n. Kim is three ...
JM
Answered by Jack M. • Maths tutor
5288 Views

What is the remainder when you divide 2x^3+7x^2-4x+7 by x^2+2x-1?

Before we answer the question let's compare the method taught for polynomial long divison to regular long division.If we wanted to find the remainder of 71 when divided by 3, we would find the nearest whole ...
JM
Answered by Jack M. • Maths tutor
4700 Views