Forming and solving equations

I think of a number, I multiply it by 5 and divide by 8. I get my answer as 10. What was the number I thinking off?

• 50

• 16

• 40

• 85

John is x years old. Ahmad is 2 years older than John. The total of their ages in 60. Calculate the age of Ahmad.

• 62

• 58

• 29

• 31

Calculate the size of each angle.

• 60, 60, 60

• 58, 58, 60

• 58, 62, 60

• 70, 50, 60

Write an expression for the perimeter of the shape in its simplest form

• $x\ +\ x\ +\ 4\ +\ x\ +\ 6$

• $3x\ +\ 10$

• $13x$

• $3x^2+\ 10$

If the perimeter of this shape is 40 cm. Calculate the length of the longest side.

• 16 cm

• 10 cm

• 20 cm

• 14 cm