Question

32. The sum of the prime factors of 1729 is
(A)13
(B)19
(C)32
(D)39

33.The greatest number which always divides the product of the predecess or and successor of an odd natural number other than 1,is
(A)6
(B)4
(C)16
(D)8

34.The number of common prime factors of 75, 60, 105 is
(A)2
(B)3
(C)4
(D)5

35.Which of the following pairs is not coprime?
(A)8, 10
(B)11, 12
(C)1, 3
(D)31, 33

36.Which of the following numbers is divisible by 11?(A)1011011
(B)1111111
(C)22222222
(D)3333333

37.LCM of 10, 15 and 20 is
(A)30
(B)60
(C)90
(D)180

38.LCM of two numbers is 180. Then which of the following is not theHCF of the numbers?
(A)45
(B)60
(C)75
(D)90

In questions 39 to 98 state whether the given statements are true (T)or false (F).

39.In Roman numeration, a symbol is not repeated more than threetimes.

40.In Roman numeration, if a symbol is repeated, its value is multipliedas many times as it occurs.

41. 5555 = 5 × 1000 + 5 × 100 + 5 × 10 + 5 × 1

42. 39746 = 3 × 10000 + 9 × 1000 + 7 × 100 + 4 × 10 + 6

43. 82546 = 8 × 1000 + 2 × 1000 + 5 × 100 + 4 × 10 + 6

44. 532235 = 5 × 100000 + 3 × 10000 + 2 × 1000 + 2 × 100 + 3 × 10 + 5a​

Answer 1

Answer:1answer = 13,18

2answer = 43Thus, we can say that 60, 75 and 105 have 2 common prime factors, namely, 3 and 5.4A. Both 8 and 10 are even. Hence, 2 is also a common factor (other than 1) hence, not coprime5