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Number System

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Welcome to your Number System

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1. 9587 - ? = 7429-4358

2. 5793405 * 9999 = ?

3. 839478 * 625 = ?

4. Total number of prime numbers less than 50 are

5. Total number of prime numbers less than 100 are

6. Name the whole number which is not a natural number?

7. Smallest prime number which is also an even number is

8. The natural numbers which are not prime, are called

9. Numbers having its unit digit is any of 0,2,4,6,8; is divisible by

10. 695421 is divisible by

11. 58694 is divisible by

12. 246591 is divisible by

13. 6879376 is divisible by

14. 16789352 is divisible by

15. 7849320 is divisible by

16. 29435417 is divisible by

17. The difference between the place value and the face value of 6 in the numeral 856973 is

18. The difference between the local value and the face value of 7 in the numeral 32675149 is

19. The unit digit in the product (784*618*917*463) is

20. The difference between the place value of two sevens in the numeral 69758472 is

21. 7589 - ? = 3434

22. 8597 - ? = 7429 - 4358

23. 3251 + 587 + 369 - ? = 3007

24. (4300731) - ? = 2535618

25. 4500 * ? = 3375

26. If 1400 *x = 1050. Then, x = ?

27. 35 + 15 *1.5 = ?

28. 5358 *51 = ?

29. 587 * 999 = ?

30. 3897 * 999 = ?

31. The sum of first 45 natural numbers is

32. How many three digit numbers are divisible by 6 in all ?

33. which one of the following numbers is exactly divisible by 11 ?

34. ( 51 + 52 + 53 +..............+100) = ?

35. (1+2+3+............+10) = ?

36. (1+2+3+........+50) = ?

37. The sum of first five prime numbers is:

38. Ho many prime numbers are less than 50?

39. The smallest 3-digit prime number is

40. If a and b are odd numbers, then which of the following is even?

41. How many of the following numbers are divisible by 3 but not by 9 ? 2133, 2343, 3474, 4131, 5286, 5340, 6336, 7347, 8115, 9276

42. The sum of all two digit numbers divisible by 5 is

43. The sum of first 45 natural numbers is

44. The sum of all even natural numbers between 1 and 31 is

45. The .................. of a digit in a numeral is its own value, at whatever place it may be.

46. All counting numbers and ........ form the set of whole numbers.

47. All counting numbers, zero and negatives of counting numbers forms the set of

48. A counting number is called a prime numbers, if it has exactly two factors, namely itself and .....?

49. A number is divisible by 10 when its unit digit is

50. A number is divisible by ........... only when its unit digit is 0 and 5.

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