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0 / 60 seg.
When Grant was 8, his brother was half his age. Now, Grant is 14. How old is his brother?
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Clue
HE IS 16 YEARS OLD. WHEN I WAS 4 YEARS OLD, MY BROTHER WAS 2 YEARS OLD (HALF MY AGE), SO MY BROTHER IS 2 YEARS YOUNGER THAN ME. WHEN I AM 18 YEARS OLD, MY BROTHER WILL BE 16 YEARS OLD AS HE IS 2 YEARS YOUNGER THAN ME
HIS YOUNGER BROTHER WAS 6. LET HIS AGE BE X, DIMPLE'S AGE BE Y, AND HIS FATHER'S AGE BE Z. THEN Z=3Y, Z=X2, Y=2X. SO 6X=X2 AND X=6
THEY HAVE 6 CHILDREN. EACH DAUGHTER HAS THE SAME BROTHER. THERE ARE 5 DAUGHTERS AND 1 SON
HIS BROTHER IS 10. HALF OF 8 IS 4, SO GRANT'S BROTHER IS 4 YEARS YOUNGER. THIS MEANS WHEN GRANT IS 14, HIS BROTHER IS STILL 4 YEARS YOUNGER, SO HE'S 10
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