Playing with Numbers-Important Questions

Class VIII Math
HOTs for Playing with Numbers
1.   If 42x5 is a multiple of 9 and x is a digit, then find the value of x.
2.   Is 10011 divisibly by 3?
3.   If 3x12 is a multiple of 3 and x is digit, then find the value of x.
4.   If 35x is a multiple of 9 and x is digit, then find the value of x.
5.   The usual form of the number 9 × 100 + 7 × 1
        (a) 97
(b) 9007
(c) 907
(d) 16
6.   A is a digit and 3A15 is a multiple of 9. Which of the following can be the value of A?
        (a) 1 or 9
(b) 0 or 8
(c) 0 or 7
(d) 0 or 9
7.   The value of A and B in
        (a) A = 7, B = 6
(b) A = 7, B = 7
(c) A = 7, B = 5
(d) A = 7, B = 4
8.   The value of A and B in
        (a) A = 9, B = 9
(b) A = 7, B = 9
(c) A = 7, B = 7
(d) A = 9, B = 7