Number System
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Avg score: 36% • Most missed: “What is the unit's digit of the number 75866256–12344256.”
Number System
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25 Questions

1. If A and B are twin primes with B>23, then which of the following numbers would always divide A+B?
2. Find the sum of (112 + 122 + 132 + ... + 202) = ?
3. Which of the following is the output of 936 x 587 - 936 x 487?
4. What is the unit's digit of the number 75866256–12344256.
5. What is the unit digit in 735 - 348?
6. What is the common factor in (4797 + 4397) and (47101 + 43101)
7. Which of the following is the output of 1607 x 1607?
8. A number when divided by 342 gives a remainder 47. When the same number is divided by 19, what would be the remainder?
9. The largest number amongst the following that will perfectly divide 101100–1 is:
10. Which of the following is the output of ((964 + 578)2 + (964 - 578)2)/(964 x 964 + 578 x 578)? 6
11. Which of the following has most number of divisors?
12. Which of the following is the output of 6894 x 99?
13. Which of the following is the output of 93 x 93 + 73 x 73 - 2 x 93 x 73?
14. Which of the following is the output of 43986 x 625?
15. If p and q are ODD Numbers, then which of these is even?
16. Which of the following is the output of 596 x 596 - 104 x 104?
17. The positive integers m and n leave remainders of 2 and 3, respectively, when divided by 6. m>n. What will be the remainder when m–n is divided by 6?
18. A boy writes all the numbers from 100 to 999. The number of zeroes that he uses is 'x', the number of 5's that he uses is 'y' and the number of 8's he uses is 'z'. What is the value of y+z-x?
19. Which of the following is a prime number?
20. Find the total number of prime factors in the product 1413 x 73 x 92?
21. What will be the remainder when 17200 is divided by 18?
22. Find the remainder when 289 is divided by 89?
23. Which of the following is the output of 57 x 57 + 43 x 43 + 2 x 57 x 43?
24. Find the sum of 12 - 22 + 32 - 42 +..+ 92 -102?
25. Which of the following is the output of [(637 + 478)2 - (637 - 478)2]/(637 x 478) ?

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