Exam Maths Puzzle Numerical Ability

53,8,51,6,47,11,49,13,12,___????????
next number ????

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Exam Other Question

percent rise in production of six companies over the years
P Q R S T U
2000 25 30 20 45 25 45
2001 20 55 45 50 45 40
2002 35 60 35 35 30 20
2003 40 30 25 30 55 55
2004 30 40 30 25 35 15
2005 45 45 40 20 45 25

WHAT IS THE DIFFERENCE IN THE PERCENT RISE IN PRODUCTION OF COMPANY U IN THE YEAR 2003 FROM 2000?
There are 7 pink, 5 black and 11 yellow balls. Minimum number of balls required to
taken out to get at least one yellow and one black ball is