Number Flashcards
How many pounds to the kilogram?
2.2 pounds.
How would you find out the cost of an item with a discount of 15% if the original cost is £581.58?
581.58 X 0.85 = 494.34
How many pints to the litre?
1.75 pints.
How many gallons to 4.5 litres?
1 gallon.
How many miles to 8 kilometres ?
5 miles.
£600 is invested for 7 years at 0.04% with a compound interest.
What is the final amount?
600 X (1.04^7) =£789.56
The sale price of a television is £350. It has been reduced by 30%. What was the original price?
350/70 is 5
5 X 100 =£500
The original price was £500.
If a number is put to the power of a negative number, what do you do?
Calculate the power as if it was positive and then find the reciprocal.
If you have (a^Z) ^Y what do you do?
The result will be a^ZY
What is the answer to 9^3/2?
Think of it as (9^0.5)^3
This is 3^3 which is 27
What do you do if you have a number to power of 1/2 or 1/5?
Find the square root or the root 5 of it.
What is an arithmetic sequence?
A sequence where the distance between numbers is always the same.
3 ,10 ,17 ,24
Here are the first terms in a sequence.
What is the equation for this sequence?
Well each one is 7 more than the last.
3-7 is -4
7n-4 is the answer.
Change 7.5 m^2 to cm^2
- 5m is 750cm (x100 to get the answer)
7. 5^2 is 75000cm^2 (x100^2 to get the answer)
With the knowledge that 56 as a product of its prime factors is 2x2x2x7 and that 98 as a product of its prime factors is 2x7x7
What is the HCF and LCM of 56 and 98?
HCF
There is one 2 and one 7 in both so the HCF is 2x7. 14
LCM.
Multiply all the other numbers that you didn’t use to find the HCF.
Multiply the collections of prime factories together but without a 2 and a 7
2x2x2x7x7=392
