Math
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Richie established a very strange number system.
According to her claim for different combination of 0 and 2 you will get only one value and it’s zero(0).
For clarity:
2 0 2
+0 +2 +2
—– —— —–
0 0 0
Now if Richie adds two numbers this way, she will get:1200
+4005
————
0070
Observing this Richie’s friend Fariha realized Richie might hide some other relation between the digits.(It’s sure that according to the number system the digits are 0,1,2,3,4,5,6,7,8,9),and no other digits or symbols exist!!Help Fariha. She want to establish the relations!!
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You’re going to a friends house and want to give them some brownies. On the way to their house you cross 5 bridges. At each bridge you must pay a toll of half of your brownies to the owner. But they are all very nice and give you back a brownie from what you give them.
How many brownies must you start with to give your friend 2 brownies?
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Some multiples of 11 have an even digit sum.
For example-
7*11 = 77 and 7+7 = 14, which is even;
11*11 = 121 and 1+2+1 = 4, which is even.Do all multiples of 11 have an even digit sum?
(Prove that they do or find the smallest that does not.)View SolutionSubmit Solution- 1,445.0K views
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