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Maths Puzzle
Numerical Ability
The positive integers N and N+1 both have digit sums that are divisible by 7. What is the smallest possible value of N?
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other Other Question
Find the only such prime number lesser than 4000 which cam be represented as the sum of two prime numbers and the difference of two prime numbers.
The height of a right circular cone is trisected by two planes drawn parallel to its base.What will be the ratios of volumes of the three portions starting from the top?
Note: If the ratio is 1:12:13 , write it as 11213.