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Ten years ago, the sum of the ages of Ted and his twin brother Todd was 22. How old is Ted now?

CDorrell Feb 24, 2019

#1**+1 **

Ted=t

Todd=d

Solution 1: Thus, we have (t-10)+(d-10)=22, t+d=22+20, t+d=42. Since they are twin brothers, Ted is 42/2=21 years old.

Solution 2: Ten years ago, each of them was 22/2=11 years old. Thus, Ted is 11+10=21 years old/

tertre Feb 24, 2019

#2**+1 **

Since they are both the same age let's say T = Ted's age now (what we are looking for...also Todd's age)

Ten years ago 2(T-10) = 22

T-10 =11

T = 21 Ted's (and Todd's) age now

ElectricPavlov Feb 24, 2019

#3**+1 **

Ten years ago, the sum of the ages of Ted and his twin brother Todd was 22. How old is Ted now?

Ted and Todd are twins, thus they are the same age.

When the sum of their ages was 22, each brother was 11.

Move forward ten years (i.e., 11 + 10), and **Ted is now 21**. So is Todd, if it matters.

...

Guest Feb 24, 2019