June 10, 2019

MCQ - Real Number - Class 10 - Part 3




21. The rational number that corresponds to 0.6 + 0.  + 0.4  is –
                a) 83/90                b)7/9                                     c) 43/90                                d) 167/90

22.  The HCF of two consecutive rational number p and p + 1 is
                a) p                        b) p+ 1                                  c) 1                                         d) 0

23. If pn = ( a x 5)n, for pn to end with the digit zero a = ---- for any natural number n is –
                a)  any natural number                  b) any even number                      
                c) any odd number                          d) none

24. 2 -  is –
                a) a rational number                       b) a natural number                       
                c) an irrational number                  d) a whole number

25. The number given below which always ends with the digit 6 for all-natural numbers n is –
                a) 4n                                                       b) 6n
                c) 2n                                                       d) 8n

26. There is a circular path around a field. Nilabh takes 22 minutes to complete one round while Nishtha takes 20 minutes to complete the same. If they both start at the same time and move in the same direction, after how many minutes will they meet again at the starting point?
                a) 220                    b) 3.4                     c) 440                    d) 4.4

27.  If two positive integers p and q can be expressed as p = ab2 and b = xy2 ; a, b being prime number then LCM( p ,q) is –
                a) ab                      b) a2b2                  c)a3b2                    d)a2b3

28.  Any one of number m, m + 2 and m + 4 is a multiple of –
                a) 2                         b) 3                        c) 4                         d) 5

29. If p is a prime number and p divides k2 , then p divides :-
                a) 2k2                     b) k                        c) 3k                       d) none of these

30. If p = HCF (100, 190) and q = LCM (100,190) then p2q2 is
                a)3.61 x 106         b)3.61 x 103         c) 3.61 x 105        d)3.61 x 108

NB :- Answer is marked with red colour

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