gmat Exam Numerical Ability

the square of a number > 1000,not divisible by 3.when divide by 3 leaves a remainder of ?

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32*32=1024
1024/3=1
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square =10201 when it is divide by 3 remainder=1
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gmat Other Question

Q. How many odd numbers less than 1000 can be formed using the digits 0, 2, 5, 7? (repetition of digits is allowed ? . A drinks machine offers three selections – Tea, Coffee or Random but the machine has been wired up wrongly so that each button does not give what it claims. If each drink costs Rs 50, what is the minimum amount of money that must be spent to determine with certainty the correct labeling of the buttons?
A. Rs 100 B. Cannot be determined from the given information C. Rs 150 D. 50