1 4 2 8 5 7 .
T H _
N _ M B _ R
_ N D
T H _
S _ M S
W _ L L
_ N L Y
C _ N T _ _ N
T H _
D _ G _ T S
1 , 2 , 4 , 5 , 7
_ N D
8 .
1 4 2 8 5 7
+
1 4 2 8 5 7
=
2 8 5 7 1 4
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
=
4 2 8 5 7 1
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
=
5 7 1 4 2 8
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
=
7 1 4 2 8 5
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
=
8 5 7 1 4 2
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
+
1 4 2 8 5 7
=
9 9 9 9 9 9 Clue
THE PROFESSOR HAS TO ADD THE REST OF THE DIGITS, FIND THE NEAREST NUMBER TO THE SUM THAT IS DIVISIBLE BY 9 AND GET THE DIFFERENCE. SO, JOHN GAVE THE NUMBER 9646 TO THE PROFESSOR. THE PROFESSOR WILL ADD THE NUMBERS (9 + 6 + 4 + 6) TO GET 25. THE NEAREST NUMBER TO 25 THAT IS DIVISIBLE BY 9 IS 27. AND THE CROSSED OUT NUMBER IS 27 - 25. THIS IS A MATHS TRICK THAT RELIES ON THE POWER OF 9 DAVID MUST GIVE ROBERT ANOTHER 20 WATER BALLOONS, GIVING THEM EACH 60. ROBERT STARTED WITH 30 WATER BALLOONS AND DAVID WITH 90 IF YOU FOLLOWED ALL THE STEPS APART FROM THE LAST ONE THERE WILL BE THREE OPTIONS REMAINING: 64, 84, AND 86. YOU THEN HAD TO ADD UP THE DIGITS, 64=6+4=10, 84=8+4=12, AND 86=8+6=14. FINALLY, YOU THEN HAD TO TAKE UP THE MIDDLE BIGGEST NUMBER (12) AND PUT IT BACK AS IT WAS BEFORE THE DIGITS WERE ADDED TOGETHER AND YOUR ANSWER SHOULD BE 84 142857. THE NUMBER AND THE SUMS WILL ONLY CONTAIN THE DIGITS 1,2,4,5,7 AND 8. 142857 + 142857 = 285714 142857 + 142857 + 142857 = 428571 142857 + 142857 + 142857 + 142857 = 571428 142857 + 142857 + 142857 + 142857 + 142857 = 714285 142857 + 142857 + 142857 + 142857 + 142857 + 142857 = 857142 142857 + 142857 + 142857 + 142857 + 142857 + 142857 + 142857 = 999999