Practice MCQ Questions and Answer on Number System
41.
Thrice the square of a natural number decreased by four times the number is equal to 50 more than the number, the number is -
- (A) 6
- (B) 5
- (C) 10
- (D) 6
42.
The least number that must be subtracted from 1294 so that the remaining number when divided by 9, 11, 13 will leave in each case the same remainder 6 is:
- (A) 2
- (B) 3
- (C) 1
- (D) 4
43.
The numbers 2, 4, 6, 8 ..... 98, 100 are multiplied together. The number of zeros at the end of the product must be :
- (A) 10
- (B) 11
- (C) 12
- (D) 13
44.
How many 3-digit numbers are there in between 100 and 300, having first and the last digit as 2 ?
- (A) 9
- (B) 10
- (C) 11
- (D) 12
45.
When we reverse the digits of the number 13, the increases by 18. How many other two digit numbers increases by 18 when their digits are reversed?
- (A) 5
- (B) 6
- (C) 7
- (D) 8
46.
Which of following can never be ending of a perfect square?
- (A) 00
- (B) 000
- (C) 1
- (D) 6
47.
The sum of digits of a two-digit number is 12 and the difference between the two-digits of the two-digit number is 6. What is the-digit number ?
- (A) 39
- (B) 84
- (C) 93
- (D) Other than the given options
48.
If 0 x 1, which of the following is greatest ?
- (A) x
- (B) x2
- (C) 2
- (D) $$\frac{1}{{{x^2}}}$$
49.
What is the value of $$99\frac{{11}}{{99}} + 99\frac{{13}}{{99}} + 99\frac{{15}}{{99}} + ........ + 99\frac{{67}}{{99}}?$$
- (A) $$\frac{{95120}}{{33}}$$
- (B) $$\frac{{96220}}{{33}}$$
- (C) $$\frac{{94220}}{{33}}$$
- (D) $$\frac{{97120}}{{33}}$$
50.
The product of two positive numbers is 11520 and their quotient is $$\frac{9}{5}$$. Find the difference between two numbers.
- (A) 60
- (B) 64
- (C) 74
- (D) 70