SSC TRICKS FOR MATHS

LET ME XPLAIN THIS RULE BY TAKING SOME EXAMPLES.... CONSIDER NUMBER 44679387, WE HAVE TO CALCULATE THE REMINDER ON DIVIDING THIS NUMBER BY 7 11 AND 13 RESPECTIVELY... MAKE TRIPLETS AS WRITTEN BELOW STARTING FROM UNITS PLACE 44.........679.........387 NOW ALTERNATE SUM = 44+387 = 431 AND 679 AND DIFFERENCE OF THESE SUMS = 679-431= 248 DIVIDE IT BY 7 WE GET REMINDER AS 3 DIVIDE IT BY 11 WE GET REMINDER AS 6 DIVIDE IT BY 13 WE GET REMINDER AS 1

LETS DISCUSS SOME BASIS IDEAS IN MATHEMATICS WHETHER YOU LOVE MATHS, OR DESPITE IT, THE FOLLOWING TRICKS CAN TURN YOU INTO A MATH WHIZ-OR AT LEAST WILL HELP TO SPEED UP SOME OF THE CALCULATIONS YOU NEED TO DO IN YOUR HEAD. I'VE INCLUDED FIVE OF MY FAVORITES HERE........ QUICK SQUARE IF YOU NEED TO SQUARE A 2 DIGIT NUMBER ENDING IN 5, MULTIPLY THE FIRST DIGIT BY ITSELF PLUS 1, AND PUT 25 ON THE END. THAT'S ALL! (25)^2=(2*(2+1))&25 2*3=6 & 25 625 MULTIPLYING BY 9 TO MULTIPLY ANY NUMBER BETWEEN 1 AND 9 BY 9, HOLD BOTH HANDS IN FRONT OF UR FACE, WITH FINGERS EXTENDED. NOW DROP THE FINGER THAT CORRESPONDS TO THE NUMBER YOU R MULTIPLYING (FOR EXAMPLE, FOR 9*3, DROP UR THIRD FINGER). NOW COUNT THE FINGERS BEFORE THE DROPPED FINGER(IN THE CASE OF 9*3 IT IS 2)-THAT'S UR FIRST DIGIT. THEN, COUNT THE FINGERS AFTER (AGAIN IN THE CASE, IT'S 7). THE ANSWER IS 27. DIVIDING BY 5 TO DIVIDE A LARGE NUMBER BY 5, ALL YOU NEED TO DO IS MULTIPLE...