can anyone solve few of answer..
1. 80,50,71,59,55,75,?, 100
2. 2,10,40, 120,?, 240
3. 5,21,81,241,?
4. 100, 200,119,183,?,170
5. 2,6,24,120, 720,?,40320
if u know then answer... All...to have more question of series.. Pls follow me... If interested... I know answer I will also post answer key of all.... After 5days.. Thankyou
Answers
Answer:
What is the next number in this series, 1, 2, 6, 24, 120, 720?
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Answer is 5040
1st method: Just Multiply each term in the given sequence with natural numbers . i.e 1 to infinity ( need of the question is only till 7).
So,
1 x 1 = 1
1 x 2 = 2
2 x 3 = 6
6 x 4 = 24
24 x 5 = 120
120 x 6 = 720
720 x 7 = 5040
2nd Method: Factorial method.
For those who don't know what is a factorial….
Factorial of a number is the product of all the preceding integers along with the number whose factorial needs to be worked on.
Factorial of a certain number is denoted by (!)
For example:
1! = 1
2! = 1 x 2 = 2
5! = 1 x 2 x 3 x 4 x 5 = 120
And so on……
So,
1! = 1
2! = 1 x 2 = 2
3! = 1 x 2 x 3 = 6
4! = 1 x
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This is a factorial series, following is the explanation :
Method 1:
1! = 1
2! = 2*1 = 2
3! = 3*2*1 = 6
4! = 4*3*2*1 = 24
5! = 5*4*3*2*1 = 120
6! = 6*5*4*3*2*1 = 720
The next number…
7! = 7*6*5*4*3*2*1 = 5040