Consider the sequence:
2 answers:
Answer:
Step-by-step explanation:
The given sequence is not arithmetic, it's a geometric sequence, that means the sequence is obtain using powers. The faster way to find the answer is to try options that fist with a geometric sequence. If we try the last one, we'll find that's the answer.
We need to try for n=1, n=2, n=3, n=4 and n=5:
a_{1}=2^{1}+3=5
a_{2}=2^{2}+3=4+3=7
a_{3}=2^{3}+3=8+3=11
a_{4}=2^{4}+3=16+3=19
a_{5}=2^{5}+3=32+3=35
Therefore, the right answer is the last choice, because as you can observe, it fits perfectly with the given sequence.
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Answer:
Stephen's wife got £354 more than his son.
Step-by-step explanation:
Given:
Amount of Lottery = £2950
Now Given:
Stephen & Richard share a lottery amount in the ratio 2 : 3
Let the common factor between them be 'x'.
So we can say that;
Dividing both side by 5 we get;
So we can say that;
Stephen share would be =
Now Given:
Stephen then shares his part between himself, his wife & their son in the ratio 3 : 5 : 2.
Let the common factor between them be 'y'.
So we can say that;
Dividing both side by 10 we get;
So Stephen's wife share =
And Stephen's son share =
Now we need to find how much more her wife got then her son.
To find how much more her wife got than her son we will subtract Stephen's son share from Stephen's wife share.
framing in equation form we get;
Amount more her wife got than her son =
Hence Stephen's wife got £354 more than his son.