Mental Arithmetic Questions Worksheets - Level 6
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21Mental Arithmetic Questions
1. What number is five cubed?
5³ = 5 x 5 x 5
125
= 25 x 5 =
KS3 MATHEMATICS
r
2. A circle has radius
.
What is the formula for the area of the circle?
10 4 10
Area = pi x radius x radius
= πr²
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Level 6 Answers
3. Jenny and Mark share some money in the ratio two to
Day 1
three. Jenny’s share is one hundred and ten pounds.
How much is Mark’s share?
Jenny
:
Mark
x 5
2
:
3
x 10
10
:
15
100
:
150
100
+10
165
110
:
4. The net of a triangular prism is made from triangles and
rectangles. How many of each shape are needed?
3 rectangles
2 triangles
5. Multiply minus six by minus two.
2x6 = 12
-2x6 = -12
12
2x-6 = -12
-2x-6 = 12
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