11. (46)2 - (?)2 = 4398 - 3066
12. Given n = 1 + x and x is the product of four consecutive integers. Then which of the following us true ?
I. n is an odd integer.
II. n is prime.
III. n is a perfect square
I. n is an odd integer.
II. n is prime.
III. n is a perfect square
13. A boy multiplies 987 by a certain number and obtains 559981 as his answer. If in the answer both 9's are wrong but the other digits are correct, then the correct answer will be :
14. The product of any three consecutive natural numbers is always divisible by :
15. If (6767 + 67) is divided by 68, the remainder is :
16. If 11,109,999 is divided by 1111, then what is the remainder ?
17. How many 3-digit numbers are there in between 100 and 300, having first and the last digit as 2 ?
18. The unit's digit in the product 274 × 318 × 577 × 313 is :
19. Which one of the following is the common factor of (4743 + 4343) and (4747 + 4347) = ?
20. If a number 774958A96B is divisible by 8 and 9, the respective values of A and B will be :
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