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0 / 60 seg.
A ship is twice as old as its boiler was when the ship was as old as the boiler is now. What is the ratio of the boiler's age to the ship's age?
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Clue
HIS SISTER IS 99 YEARS OLD. WHEN TOM WAS 2 YEARS OLD, HIS SISTER WAS 1 YEAR OLD. 98 YEARS LATER, HE BECOMES 100 YEARS OLD. AND 98 YEARS LATER, HIS SISTER WILL BE 99 (98 + 1) YEARS OLD
11 PEOPLE WERE IN THE LIBRARY. WE HAVE 2 EYES EACH, AND THERE WAS NO MENTION ABOUT THE PAIRS OF EYES. SO WE HAVE 10 PEOPLE IN ADDITION TO THE MAN WHO DROPPED THE BOOK. HE CAN'T LOOK AT HIMSELF, BUT HE'S STILL IN THE LIBRARY
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
RATIO IS 3⁄4. IF WE LET S BE THE SHIP'S AGE AND LET B BE THE BOILER'S AGE, AND T TO BE THE DIFFERENCE WE GET: S - T = B S = 2 X (B - T) IF WE ELIMINATE T (WITH T = S - B), WE WILL GET: B⁄S = 3⁄4
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