Ks3 Mathematics 10-4-10 Level 5 Answer Booklet Page 5
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31MENTAL QUESTIONS
DAY 2
1
What is three fifths of forty pounds?
1/5 of £40 = £8
so 3/5 = 3 x 8 = £24
2
What is the volume of a cuboid
measuring five centimetres by six
centimetres by seven centimetres?
3
5 x 6 x 7 = 30 x 7 = 210cm
3
Look at these numbers. Add them.
7, 9.
Same as 6 + 10 16
4
I start at one point seven and count up
in equal steps.
One point seven, one point eight, one
point nine,…
What is the next number?
2 or two or 2.0
5
Write the ratio twelve to six in its
simplest form.
12:6 (divide by 2)
6:3 (divide by 3)
2:1
5
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