9.A boy is 4 years old and his sister is three times as old as he is. When the boy is 12 years old, how old will his sister be?
25
20
19
2007-10-29 11:32:03 · 10 answers · asked by dowagiac.michigan 1 in Education & Reference ➔ Trivia
His sister will be 20 years old
2007-10-29 11:43:40 · answer #1 · answered by Sharon Newman (YR) Must Die 7 · 0⤊ 0⤋
20
2007-11-02 18:31:58 · answer #2 · answered by the_shepherd's_child 5 · 0⤊ 0⤋
20
2007-10-29 18:34:28 · answer #3 · answered by pgiggles 3 · 0⤊ 0⤋
If he is 4, then his sister is 12.
Eight years from now, he will be 12.
His sister will then be 8+12 = 20.
2007-10-29 19:03:34 · answer #4 · answered by abcdunlimited 1 · 2⤊ 0⤋
he is 4 she is 12 there is 8 years between them
when he is 12 she will be eight years older = 20
2007-10-29 18:58:03 · answer #5 · answered by The old man 6 · 0⤊ 0⤋
20
4x3=12
12-4=8
12+8=20
2007-10-29 21:04:28 · answer #6 · answered by shanna t 1 · 0⤊ 0⤋
20
Step 1: 4x3=12
Step 2: 12-4=8
Step 3: 12=8=20
2007-10-29 19:37:40 · answer #7 · answered by Lexiee. 2 · 0⤊ 0⤋
20
4x3=12
12-4=8
12+8=20 years old
2007-10-29 18:40:04 · answer #8 · answered by Treeckachu 1 · 0⤊ 0⤋
His sister is 8 years older than he is.
So, when he's 12 she'll be 20.
2007-10-29 18:37:41 · answer #9 · answered by Anonymous · 0⤊ 0⤋
She will be 19 because everyone else has done the math and come up with 20 and i want to be different.
:)
2007-11-02 13:45:50 · answer #10 · answered by Mark 2 · 0⤊ 0⤋