Multiple Choice Questions
1. Generalised form of a two-digit number xy is
- (a) x + y
- (b) 10x + y
- (c) 10x – y
- (d) 10y + x
2. Generalised form of a three-digit number xyz is
- (a) x + y + z
- (b) 100x + 10y + z
- (c) 100z + 10y + x
- (d) 100y + 10x + z
3. Generalised form of a four-digit number abdc is
- (a) 1000a + 100b + 10c + d
- (b) 1000a + 100c + 10b + d
- (c) 1000a + 100b + 10d + c
- (d) a × b × c × d
4. The usual form of 100a + b + 10c is
- (a) abc
- (b) cab
- (c) bac
- (d) acb
5. When written in usual form 100a + 10c + 9 is equal to
- (a) a9c
- (b) ac9
- (c) ca9
- (d) c9a
6. The usual form of 1000a + 10b + c is
- (a) abc
- (b) abc0
- (c) a0bc
- (d) ab0c
7. A six-digit number is formed by repeating a three-digit number. For example, 123123, 789789 etc. Any number of this form is divisible by
- (a) 7 only
- (b) 11 only
- (c) 13 only
- (d) 1001
8. The number ab – ba, where a and b are digits and a > b is always divisible by
- (a) 15
- (b) 10
- (c) 9
- (d) 2
9. Let abc be a three-digit number. Then abc – cba is not divisible by
- (a) 9
- (b) 11
- (c) 18
- (d) 33
10. The sum of all the numbers formed by the digits x, y and z of the number xyz is divisible by
- (a) 11
- (b) 33
- (c) 37
- (d) 74
11. If the sum of digits of a number is divisible by three, then the number is always divisible by
- (a) 2
- (b) 3
- (c) 6
- (d) 9
Mind Stretching Exercises
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Thank you Sir
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Amazing collection.
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Thank you. Hope this will help the students.
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