5
Q:

# The difference between a two-digit number and the number obtained by interchanging the two digits is 63. Which is the smaller of the two numbers ?

 A) 12 B) 15 C) 17 D) none of these answers can be determined

Explanation:

Let the ten's digit be x and unit's digit be y.

Then, (10x + y) - (10y + x) = 63

=>  9 (x - y) = 63

=> x - y = 7.

Thus, none of the numbers can be deermined..

Q:

A positive number when decreased by 4, is equal to 21 times the reciprocal of this number. The number is

 A) 3 B) 7 C) 5 D) 9

Explanation:

0 56
Q:

How many numbers are there from 200 to 800 which are neither divisible by 5 nor by 7?

 A) 407 B) 410 C) 413 D) 411

Explanation:

4 216
Q:

How many natural numbers less than 500, when divided by 35 and 49, will leave a remainder of 30 in each case?

 A) 4 B) 3 C) 1 D) 2

Explanation:

0 125
Q:

If the nine-digit number 708x6y8z9 is divisible by 99, then what is the value of x + y + z?

 A) 5 B) 27 C) 16 D) 9

Explanation:

0 243
Q:

If the given number 925x85 is divisible by 11, then the smallest value of x is:

 A) 1 B) 2 C) 3 D) 4

Explanation:

0 533
Q:

What x is added to each of 10, 16, 22 and 32, the numbers so obtained in this order are in proportion? What is the mean proportional between the numbers (x + 1) and (3x + 1)?

 A) 12 B) 9 C) 15 D) 10

Explanation:

0 108
Q:

When a positive integer is divided by d, the remainder is 15. When ten times of the same number is divided by d. the remainder is 6.
The least possible value of d is:

 A) 9 B) 16 C) 18 D) 12

Explanation:

1 182
Q:

The greatest number which should be replace '*’ in the number 146*48 to make t divisible by 8 is:

 A) 8 B) 9 C) 2 D) 0