Other Maths Puzzle Numerical Ability

7 string of flower are made of 4 flower(red,green,blue,yellow), no same flower adjacent to each other ...how many such diffrent string of flower can be distributed to diffrent home.

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Other Other Question

(#M40039325) TCS QUESTION remainder theorem KEEP AN EYE what is the remainder when 72^21 divided by 25 abd4=dcba then values of a,b,c,d