1 x 35 is divisible by 9 if x = _______.
Answer: 0 1 x 35 is divisible by 9 if x = 0. A number is divisible by 9 if... View Article
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The difference of three-digit number and the number obtained by putting the digits in reverse order is always divisible by 9 and ___________.
Answer: 11 The difference between the three-digit number and the number obtained by putting the digits in reverse order is... View Article
The difference of a two–digit number and the number obtained by reversing its digits is always divisible by ___________.
Answer: 9 Let “a” and “b” be the digits, then X = ab By reversing the digits, then take Y... View Article
The sum of a two–digit number and the number obtained by reversing the digits is always divisible by __________.
Answer: 11 Let “a” and “b” be the digits, then X = ab By reversing the digits, then take Y... View Article
3×5 is divisible by 9 if the digit x is __________.
Answer: 1 3 × 5 is divisible by 9 if the digit x is 1. It is known that, if... View Article
20×3 is a multiple of 3 if the digit x is ______ or ______ or ______.
Answer: 1 or 4 or 7 It is known that, when a number is a multiple of 3, if the... View Article
3134673 is divisible by 3 and ______.
Answer: 9 3134673 is divisible by 3 and 9. Let us consider the sum of the digit of 3134673 The... View Article
Which of the following numbers is divisible by 99 (a) 913462 (b) 114345 (c) 135792 (d) 3572406
Answer: (b) 114345 If a number is divisible is 99, it should be divisible by both 9 and 11. Consider... View Article
If 6 A × B = A 8 B, then the value of A – B is (a) –2 (b) 2 (c) –3 (d) 3
Answer: (a) -2 Given that, 6 A × B = A 8 B So, AB = B Therefore A =... View Article
If 5 A × A = 399, then the value of A is (a) 3 (b) 6 (c) 7 (d) 9
Answer: In the 1’s place, the product of A and A gives 9. Here, A is a number whose multiplication... View Article
If A 3 + 8 B = 150, then the value of A + B is (a) 13 (b) 12 (c) 17 (d) 15
Answer: From the question, In 1’s place, we have to add 3 + B = 0 Since B is a... View Article
If 5 A + B 3 = 65, then the value of A and B is (a) A = 2, B = 3 (b) A = 3, B = 2 (c) A = 2, B = 1 (d) A = 1, B = 2
Answer: (c) A = 2, B = 1 In the 1’s column A +3 = 5 When A is added... View Article
If x + y + z = 6 and z is an odd digit, then the three-digit number xyz is (a) an odd multiple of 3 (b) odd multiple of 6 (c) even multiple of 3 (d) even multiple of 9
Answer: (a) an odd multiple of 3 Given that, the sum of the digits xyz is given as x+y+z is... View Article
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
Answer: (b) 3 If the sum of the digits of a number is divisible by 3, then the number is... View Article
A six-digit number is formed by repeating a three-digit number. For example 256256, 678678, etc. Any number of this form is divisible by (a) 7 only (b) 11 only (c) 13 only (d) 1001
Answer: (d) 1001 From the given question, the number should be of the form abcabc So the general form of... View Article
If abc is a three digit number, then the number abc – a – b – c is divisible by (a) 9 (b) 90 (c) 10 (d) 11
Answer: (a) 9 We know that the general form of abc is 100a + 10b + c Then the given... View Article
A four-digit number 4ab5 is divisible by 55. Then the value of b – a is (a) 0 (b) 1 (c) 4 (d) 5
Answer: (b) 1 We know that the four digit number 4ab5 which is divisible by 55 is also divisible by... View Article
Let abc be a three digit number. Then abc + bca + cab is not divisible by (a) a + b + c (b) 3 (c) 37 (d) 9
Answer: (d) 9 The general form of abc = 100a + 10b + c The general form of bca =... View Article
A four-digit number aabb is divisible by 55. Then possible value(s) of b is/are (a) 0 and 2 (b) 2 and 5 (c) 0 and 5 (d) 7
Answer: (c) 0 and 5 It is known that if a four-digit number aabb is divisible by 55, then the... View Article
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
Answer: (c) 37 It is known that, three numbers which can be formed by the using the digits x, y... View Article
