Free Show 100 Questions 200 Marks 60 Mins Last updated on Nov 29, 2022 The SSC is going to release the SSC CHSL notification on 6th December 2022. Earlier, the notification was scheduled to be released on 5th November 2022. Candidates could log in to their profiles and check individual marks between 26th November 2022 to 16th November 2022. Candidates who have completed Higher Secondary (10+2) can appear for this exam for recruitment to various posts like Postal Assistant, Lower Divisional Clerks, Court Clerk, Sorting Assistants, Data Entry Operators, etc. The SSC Selection Process consists of Computer Based Exam, Descriptive Test and Typing/Skill Test. Recently, the board has released the SSC CHSL Skill Test Result for the 2020 cycle. The candidates who are qualified are eligible to attend the document verification. Let's discuss the concepts related to Puzzle and Quant Based Puzzle. Explore more from Logical Reasoning here. Learn now! Age 11 to 14 |
| Number you tell the computer was your answer | Number the computer says you started from |
|---|---|
| 1 | 0 |
| 2 | 0.5 |
| 3 | 1 |
| 4 | 1.5 |
| 5 | 2 |
As you can see, the sequence is progressing by 0.5, thus is linear. It is adding 0.5 so, and we can see that when 0.5$\times n$ is done, you the sequence now looks like this:
| Number you tell the computer was your answer ($n$) | Number the computer says you started from | 0.5$\times n$ |
|---|---|---|
| 1 | 0 | 0.5 |
| 2 | 0.5 | 1 |
| 3 | 1 | 1.5 |
| 4 | 1.5 | 2 |
| 5 | 2 | 2.5 |
The answer to the subsitution is always 0.5 greater than the actual answer,
therefore, we need to always substract 0.5
Therefore, the instructions are directly 0.5$n-$0.5 !
Can you see how this result is related to Furkan's equation?
We received lots of sets of instructions for similar activities.
These instructions are from Tamara from Humanitree:
.Think of a number
.multiply it by
4
.subtract 2
.add 1
Your number was”¦
So if the final number was 19 first you would need to subtract 1. That would equal to 18. Then you would need to add 2, which would equal to 20. And [finally] you would need to divide it by 4. This equals to 5 so the first number would be 5.
Federico from Humanitree used algebra:
Subtract 10
Divide by 4
Add 5
If the number was $n$
You would do
$(n-5) \times4 +10 = $ end number ($x$)
Then the computer would do this operation to get the original value of $n:$
$(x-10)\div4 +5 =$ starting number
This operation would give you the original results.
Abdullah from Poland wrote a Python program to guess your number:
print("YOUR NUMBER WAS...")
print()
print("Press [ENTER] after you made each move.")
print()
input("Think of a number.")
print()
input("Add 9")
print()
input("Divide it by 4")
print()
input("Subtract 6")
print()
input("Triple it")
print()
input("Subtract 23")
number = float(input("Now, type in number you finished with and then press enter."))
print("Processing...")
answer = (((number + 23) / 3) + 6) * 4 - 9
print("You chose the number %s" % answer)
Leila C and Scarlett K from Westridge School for Girls and KSc from Cheadle Academy sent in interesting sets of instructions which will always give the same result, like in the
problem Your Number Is...
If you follow these instructions, will it ever be possible for the computer to work out what number you started from?
These are KSc's instructions:
- Think of a number: $x$ $\lt\lt\lt$ [Input] number
- Add $3$: $x+3$
- Double it: $2x+6$ $\lt\lt\lt$ Begin to balance out dividable equation
- Add $4$: $2x+10$ $\lt\lt\lt$ Equation can now be easily divided
- Divide by $2$: $x+5$ $\lt\lt\lt$ Simplify equation
- Subtract [original] number from [current] number: $x+5\hspace{2mm}-x$ $\lt\lt\lt$ Balace equation [balancing $x$ with $-x$]
- $x=$ always $5$ $\lt\lt\lt x$ is always fixed at $5$
