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1. Round the following numbers to 1 decimal place.
a) 0.23
b) 0.678
c) 2.6893
d) 0.9324
2. Work out the following
a) 4.01 x 11.9
b) 1.32 x 23.8
c) 5.1 x 0.23
d) 0.7 x 600
3. Workout the following
a) 1.41 ÷ 100
b) 5.1 ÷ 1000
c) 0.008 ÷ 0.4
d) 0.624 ÷ 0.3
4. Write the following using index notation
For Power/index press shift and ‘6’ or find this symbol ‘^’ followed by the power value. i.e.: 4^2
a) 3 x 3
b) 7 x 7 x 7 x 7 x7
5. Simplify these expressions. Leave your answers in index form.
a) 4^7 x 4^4
b) 6^8÷ 6^3
c) (11^2)^5
6. Write down all the prime numbers in this list:
,15, 22, 34, , ,
7. Write down the following numbers as the product of two prime factors
a) 15
b) 21
c) 22
d) 6
e) 14
8. Ashley runs in two cross country races. He runs the first in 45mins and the second in 3 ½ hours. Find the ratio of his first race time to his second race time in its simplest form.
:
9. In a school of 600 pupils the ratio of right-handed pupils to the total number od students is 7:8. How many left-handed pupils are there?
Answer: pupils
10. Damelza’s salary of £24, 500 is increased by 15%. What is her new salary?
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1. Write all the factors for each number
a. 8 [ , , , ]
b. 16 [ , , , , ]
c. 23 [ , ]
d. 34 [ , , , ]
e. 48 [ , , , , , , , , ]
2. Find the common factors of these numbers
a. 10 and 20 [ , , , ]
b. 9 and 36 [ , , ]
c. 24 and 30 [ , , , ]
d. 12 and 15 [ , ]
3. Find the highest common factor of these numbers
a. 18 and 30
b. 24 and 56
c. 48, 112 and 114
4. Jo’s age this year is a multiple of 6. Next year it will be a multiple of 5. How old might he be?
Answer: [ ]
5. Use a calculator to work out each of these squares
a. 62
b. 183
c. 472
d. 62 – 23
e. 43 + 42
f. 122 + 132 + 142
6. Fill in the missing power.
a. 3^ = 9
b. 4^ = 64
c. 10^ = 1000
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1. In New York, the evening temperature was -4°C. During the night, the temperature dropped by 7°C. What was the lowest temperature that night?
Answer: °C
2. Work out the following calculation:
1.2 + 1.3 + 0.25 =
3. Work out 5390 x 0.28 =
Answer:
4. Work out 1509200 ÷ 53.9 =
Answer:
5. It costs £35.55 to buy nine identical books. How much would it cost to buy seven of these books?
Answer:
6. Write down the prime numbers in this list: 7, 17. 18, 31, 33, 51, 54
Answer: [ , , , ]
7. Find the common factors of 12 and 20.
Answe: [ , , ]
8. Mike visits Oscar every 4 days, while Narinda visits every 5 days. If they both visited today, how many days will It be before they visit the same day again?
Answer:
9. The price of a holiday increases from £320 to £364.80. Find the percentage increase.
Answer: % increase
10. Three friends win $6000 between them. They decide to share the money in the ratio 3: 5: 4. Calculate the amounts they receive.
3 parts $ ]
5 parts $
4 parts $
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