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Here we provide thousands of Question and their ANSWERS. Our question is helpful in ECAT, UPSC(IAS/IPS/IFS), ESE, EES, NTS FSc, BSc and all kinds of MATH/IQ TESTS.

Fill the box using (1, 3, 5, 7 ,9, 11, 13, 15) ?

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Answer
     (3+3) + (3+3) + (3+3) + (3+3) + (3+3) = 30
Explanation

This is an interesting question this kind of question was already asked in india's compitative exam UPSC(IAS/IPS) in year 2013. And only toper of this exam can solve it.

The following are the numbers that you can use to fill in the brackets: 1, 3, 5, 7, 9, 11, 13 and 15. You can repeat the numbers if required. The resulting sum should be 30.

    (15-9)+(13-7)+(7-1)+(9-1)+(13-9)=30

If you solve inside the brackets, you will get the following equation 6 + 6 + 6 + 8 + 4 and by adding all these numbers you will get 30.

    or
    (7-1)+(15-9)+(11-5)+(13-3)+(3-1) = 30

This is not mention in above question that you can use sign or not. Thus we can use the sign (+, -, x etc ).
Because in the given question it is also mention that we can repeated the numbers. So wee can also solve it as...

    (3+3) + (3+3) + (3+3) + (3+3) + (3+3) = 30

The above solution is best and easy way.

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ORDER OF OPERATION ([{(-)}], ()^2 √ , ÷, ×, +, -)

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