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63. If the daughter is 21 now and also half of her mom's age then her mom is now 42 yrs old. In 21 years her mom will be 63 (42 + 21).

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Mary is twice as old as her brother and half as old as her father In 22 years her brother will be half as old as his father How old is Mary now?

Mary is now 22 yrs old, her brother is 11, and her father is 44 yrs old. In 22 years, her brother will be 33 and her father will be 66, while Mary will be 44 yrs old. To figure it out we need to set up algebraic equations relating everyone's current age: M (mary's age now) = 2*B (brother's age now) M = 1/2*F(father's age now) In 22 years from now, her brothers age will be half her father's age. So, B+22 = 1/2(F+22) We can use these equations to solve for everyone's age now. (1) Since Mary's age now is twice her brothers and half of her fathers we combine the first two equations to get: 2B = 1/2F or F=4B, so her father's age now is 4 times her brother's age now. (2) Using this equation and substitute the value for F in the equation which relates her brother's and father's ages 22 years from now and solve for her brother's age now. B + 22 = 1/2 (4B + 22) B + 22 = 2B + 11 B = 11, and F = 4*(11) = 44, and M=2*11=22


Tom is twice as old as Sally's age when he was the age that Sally is now Tom is now 24 How old is Sally now According to the book the answer is 18 but we think the right answer should be 16?

Book answer: Tom now 24, Sally now 18 6 years ago Tom was 18 and Sally was 12 which is half Tom's present age. Book appears to be correct. Your answer: Tom now 24, Sally now 16 Eight years ago Tom was 16 and Sally was 8 which is half Tom's age THEN, not NOW.


Your daughter is twice as old as your son and half as old as you are In 22 years your son will be half your age So how old is your daughter?

To figure it out we need to set up algebraic equations relating everyone's current age: x = Brother's age 2x = Sister's age 4x = Parent's age Which means in 22 years: x+22 (Brother)= (4x+22)(Parent)/2 Multiply both sides by 2 2x+44 =4x+22 Divide both sides by 2 x+22=2x+11 Subtract 11 from both sides x+11 = 2x Subtract x from both sides 11 = x Mary is now 22 yrs old, her brother is 11, and her parent is 44 yrs old. In 22 years, her brother will be 33 and her parent will be 66, while Mary will be 44 yrs old.


Max's age is 2 more than his father's age divided by 4. Max is 13 years old. How old is his dad?

44.


Erin's age is 3 times Warren's In 4 years she will be twice as old as he will be How old is each now?

Today: Erin's age is 3x and Warren's age is x Four years from now: Erin's age is 3x+4 and Warren's age is x+4 3x+4 = 2(x+4) 3x+4 = 2x+8 x = 4 Warren is four years old and Erin is twelve years old.