Mental Maths (2)
One of
the tests you will have to do is an oral test. You must try and do the working
out in your head.
These tests see how quick you can answer questions. Many of them will give easy
answers if you listen and think carefully.
The best way to do this type of test is to practise frequently.
Today we are going to do another of these tests.
DON’T PANIC!
INSTRUCTIONS
Below are 20 questions. Get someone to read them to you.
Each question should be read out clearly twice and you have 5 seconds to answer after the second reading of the question.
(Some are 10 seconds and it says ten next to them)
|
No |
Question |
|
1 |
39 + 21 |
|
2 |
399-299 |
|
3 |
6 X 8 |
|
4 |
17 X 10 |
|
5 |
205 ÷ 100 |
|
6 |
An orange costs 49p How much do 3 oranges cost? |
|
7 |
51-13 |
|
8 |
A bag of sweets weighs 20g How many would weigh exactly 1 kg? |
|
9 |
A bag of potatoes weighs 56kg how many 2 kg bags can you get from it? |
|
10 |
What is the biggest number you can make out of the following 3 numbers 4,6,9? |
|
11 |
2.9 X 100 |
|
12 |
A square has got sides of length 4 cm What is its area? |
|
13 |
What is the length of its perimeter, if the sides of the square are 4cm long? |
|
14 |
In a school of 120 children only 1/3 are girls. How many boys are in the school? |
|
15 |
A triangle has got three angles a=60 b=50 What is the value of c? |
|
16 |
If I am facing North and I turn clockwise through 180 degrees. Which direction am I facing? |
|
17 |
How many grams are there in 3 5 Kg |
|
18 |
A
sack of letters weighs 3 kg (without the weight of the sack). Each letter
weighs 20g. |
|
19 |
I
set off on a journey at 7.55 am. I have been travelling for 55 min. |
|
20 |
How many minutes are there in 4 and half-hours? |
|
No |
Question |
Answer |
|
1 |
39 + 21 |
60 |
|
2 |
399-299 |
100 |
|
3 |
6 X 8 |
48 |
|
4 |
17 X 10 |
170 |
|
5 |
205 ÷ 100 |
2.05 |
|
6 |
An orange costs 49p How much do 3 oranges cost? |
£1.47p |
|
7 |
51-13 |
38 |
|
8 |
A bag of sweets weighs 20g How many would weigh exactly 1 kg? |
50 |
|
9 |
A bag of potatoes weighs 56kg how many 2 kg bags can you get from it? |
28 |
|
10 |
What is the biggest number you can make out of the following 3 numbers 4,6,9? |
964 |
|
11 |
2.9 X 100 |
290 |
|
12 |
A square has got sides of length 4 cm What is its area? |
16cm2 |
|
13 |
What is the length of its perimeter, if the sides of the square are 4cm long? |
16cm |
|
14 |
In a school of 120 children only 1/3 are girls. How many boys are in the school? |
80 boys |
|
15 |
A triangle has got three angles a=60 b=50 What is the value of c? |
70 degrees |
|
16 |
If I am facing North and I turn clockwise through 180 degrees. Which direction am I facing? |
South |
|
17 |
How many grams are there in 3 5 Kg |
3500 |
|
18 |
A sack of letters weighs 3 kg
(without the weight of the sack). Each letter weighs 20g. |
150 |
|
19 |
I set off on a journey at 7.55 am.
I have been travelling for 55 min. |
8.50 am |
|
20 |
How many minutes are there in 4 and half-hours? |
270 minutes |
Well how
did you do? What
did you notice about these questions?
They contain the following
Conversions: minutes to hours hours to minutes
Grams to kilograms kilograms to grams
Fractions
Triangles
Area
Perimeters
Numbers close together
X by 10, 100
÷ by 10 ,100
Time
Addition
subtraction
Multiplication
Division.
So these are the things you will need to practise over the next few days.
To finish off here are five more questions. There are more difficult, but you do get 15 seconds to answer each of these.
INSTRUCTIONS
Below are 5 questions. Get someone to read them to you.
Each question should be read out clearly twice and you have 15 seconds to answer after the second reading of the question.
|
No |
Question |
|
1 |
Find 15% of £300 |
|
2 |
I have £5 and I buy 4 comics at 45p each. How much change will I have? |
|
3 |
Mrs Paid is 32. Her daughter is 1/4 of her age, but only half as old as her brother. What is the age of Mrs Paid's son? |
|
4 |
4 kg of apples contains 40 apples. What is the average weight of each apple? |
|
5 |
What is 50% of a 1/2 |
|
No |
Question |
Answer |
|
1 |
Find 15% of £300 |
£45 |
|
2 |
I have £5 and I buy 4 comics at 45p each. How much change will I have? |
£3.20 |
|
3 |
Mrs Paid is 32. Her daughter is 1/4 of her age, but only half as old as her brother. What is the age of Mrs Paid's son? |
16 years |
|
4 |
4 kg of apples contains 40 apples. What is the average weight of each apple? |
100g |
|
5 |
What is 50% of a 1/2 |
1/4 |
Well how did you do today?
I hope that you improved your score from last time and didn't find them too tricky.
Good luck!