Number System
When (21)² is subtracted from the square of a number the answer obtained is 1584. What is the number ?

65
55
45
35

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Number System
The sum of 8 consecutive odd numbers is 656. Also average of four consecutive even numbers is 87. What is the sum of the smallest odd number and second largest even number ?

158
160
167
163

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Number System
Which of the following number is divisible by 4 and 9?

3814
3954
2736
2368

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