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All the numerals must be used in the given order (each just once) and without turning upside down.

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Using the numerals 1, 9, 9 and 6, mathematical symbols +, -, x, :, root and brackets create the following numbers:
29, 32, 35, 38, 70, 73, 76, 77, 100 and 1000.
All the numerals must be used in the given order (each just once) and without turning upside down.

posted Aug 7, 2014 by Vrije Mani Upadhyay

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1 Answer (Check Answer ▼)





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+1 vote

Calculate the numbers in the order shown, do not change the order of the numbers.

Replace each question mark with a mathematical sign. Plus, minus, multiply and divide can each be used once only.

In which order should they be used to score 25?

6 ? 5 ? 7 ? 2 ? 3 = 25

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Use the digits from 1 up to 9 and make 100.

Follow the rules.
=> Each digit should be used only once.
=> You can only use addition.
=> For making a number, two single digits can be combined (example, 4 and 2 can be combined to form 42 or 24)
=> A fraction can also be made by combining the two single digits (example, 4 and 2 can be combined to form 4/2 or 2/4)

How can we do this ?

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Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

+1 vote

Numbers to be arranged

_ + _ = _ 
_ + _ = _ 
_ + _ = _ 
_ + _ = _ 

Fill the blanks with numbers above, so:
* The 4 additions are right.
* All numbers must be used.
* If we turn the additions upside down, they are still right.
* You can rotate any numbers too, example 1091 -> 1601.

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