Math
posted by David .
Hello. I am trying to help out my sister and find patterns in numbers....
Ex/ 1+2
2+2
3+2
4+2
My question is... I can't figure out what the pattern is in the following set...
1 goes to 4
2 goes to 7
3 goes to 10
and 4 goes to 13......
I initially thought that it was 3x + 2 but it does not work for the third. Can you help?

1 + 3 = 4
2 + 5 = 7
3 + 7 = 10
4 + 9 = 13
5 + ? = 16
You might show her with subtraction:
4  1 = ?
7  2 = ?
Respond to this Question
Similar Questions

Elementary Math
Find the missing numbers and landmarks for the set of numbers: 48, 50, 51, 51, 57, 59, 60, 63, 69, ______ , 76, ______ . A Range: _____ B. Mode: __76__ C. Minimum: __48__ D. Maximum __76__ Help  we donâ€™t understand this, or see … 
For Reimy
Math (Reimy)  Reiny, Thursday, June 25, 2009 at 4:46pm You are welcome Just as an afterthought... There is also a set of numbers called the pyramidal numbers, they are ... 1 4 10 20 .... Can you figure out the pattern? 
math
I am trying to figure out a lettern pattern and what comes next A,Y,C,W,__ __ ___ I need to explain the rule for this pattern but I am having a hard time 
math
Find the first and third quartiles, Q1 and Q3, of the following set of numbers. 13, 5, 12, 16, 7, 14, 7, 3, 10, 7 i don't know how to figure it out can you help please. thanks 
4th grade
Exploring Algebra: What's the rule? You can find patterns to figure out the tables. What is an "In" and an "Out" number  when the In numbers are greater than the out numbers, does the rule use addition or subtraction? 
Algebra
Hello. I am trying to figure out how to find the number of solutions in the following problem: (x + 8) (x + 8) = 0 
math
the difference of two numbers is 5. their product is 176. what are the numbers ? 
Math Pattern Help
Please help me to find out the missing y Numbers. I cannot figure out the pattern. x Y 1 9 2 8 3 7 4 8 10 12 2 15 20 
calculusderivatives
Hello, please help me. I needed to find the derivative of f(x)= x^4 2x^3 + x +1. I got f'(x)= 4x^3 6x^2 +1. I would like to figure out the critical numbers so I can figure out where it increases and decreases, but I have no idea … 
Math
I'm trying to figure out the mode and modal class and the numbers that are the mode are 17, 20, 24, 25, 31, 33 from a set of numbers. (I already figured that part out). My question is what of those numbers is the modal class or in …