Who is smaller?
C is 5 years smaller than D.
B is 1 year greater than C.
A is 5 years smaller than B.
If D is 20 years old, find the age of A.
The answer is 11.
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
3 solutions
Nice solution. :)
Log in to reply
Use the facts:
D = 2 0
C = 2 0 − 5 = 1 5
B = 1 5 + 1 = 1 6
A = 1 6 − 5 = 1 1
Log in to reply
I know, I only made it. 😂 It is very easy for our age and standards.
Log in to reply
@Aryan Sanghi – You know, I made a sequence that displays all of the natural numbers. I just need to find it.
Your challenge when I make the note on it: write a Python program or algebraic proof that proves all the natural numbers are in this sequence.
But it's not n + 0 ...
Log in to reply
@Yajat Shamji – Ok, I'll do. Mention me in the note when you make it.
here it is:
C is 5 years smaller than D.
so, D = 5 + C .........................[1]
B is 1 year greater than C.
so, B = 1 + C ........................[2]
A is 5 years smaller than B.
so, B = 5 + A .......................[3]
now, D=20, so, C = 1 5 ...........[1]
and, B = 1 6 .............................[2]
and A = 1 1 ................................[3]
so,A is 11 years old
D C B A = 2 0 = D − 5 = 1 5 = C + 1 = 1 6 = B − 5 = 1 1
E a s y Q u e s t i o n : − )
I mean like, why did u even post a solution
Log in to reply
Sir, I posted this question when I was in class 3rd. If you felt the question was so easy, why did you attempt it. If you solved it that doesn't mean you will post such comments.
Sorry if I hurt your feelings.
I posted a solution because I wanted to :P
2 0 − 5 = 1 5 + 1 − 1 6 − 5 = 1 1
@Aryan Sanghi