I donot know Why Number seven is something special.
Week days - 7
Tones in Music - 7
Basic Colours - 7
What else you know about it.? Any way During all qna exersize,you must have read many more qna from all. If you have been heart feeling ,anger,happyness or feel like crying.shouting.Kindly express in the answer of this question ,feelings and color you want apply.Like , for Crush- Y,Hurt- R,Sad- Grey,Warm-Back and so on.or any other way you like to express. You can answer this question for only seven days. (For best answer)
That is 7, 7+7=14-1+4=5, and so on.The same holds good for multiplication also.
SEVEN IS THE FOURTH PRIME NUMBER. IT IS NOT ONLY A MERSENNE PRIME (SINCE 23 1 = 7) BUT ALSO A DOUBLE MERSENNE PRIME SINCE IT IS ITSELF THE EXPONENT FOR ANOTHER MERSENNE PRIME (127). IT IS ALSO A NEWMAN-SHANKS-WILLIAMS PRIME, A WOODALL PRIME, A FACTORIAL PRIME, A LUCKY PRIME, AHAPPY NUMBER, A SAFE PRIME AND THE FOURTH HEEGNER NUMBER.
SEVEN IS THE LOWEST NUMBER WHICH CANNOT BE REPRESENTED AS THE SUM OF THE SQUARES OF THREE INTEGERS.
SEVEN IS THE ALIQUOT SUM OF ONE NUMBER, THE CUBIC NUMBER 8 AND IS THE BASE OF THE 7-ALIQUOT TREE.
It is also said to be a lucky number.
N = 7 IS THE FIRST NATURAL NUMBER FOR WHICH THE NEXT STATEMENT DOES NOT HOLD: "TWO NILPOTENTENDOMORPHISMS FROM CN WITH THE SAME MINIMAL POLYNOMIAL AND THE SAME RANK ARE SIMILAR."
7 IS THE ONLY DIMENSION, BESIDES TH ...more