You are Here: Home >< GCSEs

Announcements
1. nick has a six digit code. He remembers it as three 2-digit numbers. The first number is between 10 and 20. The second number is 3 times the first number. The third number is 5 times the first number. All six digits are different. Work out the code
2. (Original post by gcse_nightmare)
nick has a six digit code. He remembers it as three 2-digit numbers. The first number is between 10 and 20. The second number is 3 times the first number. The third number is 5 times the first number. All six digits are different. Work out the code
Let x be the first number. It is given that x >= 10.

5x <= 99. So x <= 19.

Now just try all numbers from 10 to 19 as the first number and see which one works

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: January 12, 2019
Today on TSR

### Lied on my UCAS

And my school told me not to change it

### University open days

• University of the West of England, Bristol
Wed, 23 Jan '19
• University of East London
Wed, 23 Jan '19
• University of Gloucestershire
School of Education Open Day Postgraduate
Wed, 23 Jan '19
Poll
Useful resources

## Study tools

### Essay expert

Learn to write like a pro with our ultimate essay guide.

See where you can apply with our uni match tool

### Make study resources

Create all the resources you need to get the grades.

### Create your own Study Plan

Organise all your homework and exams so you never miss another deadline.

### Resources by subject

From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

### Find past papers

100s of GCSE past papers for all your subjects at your fingertips.