Numbers
1.
Two number are less thean the third number by 50% and 54% respectively. By how much per cent is the second number less than the first number?
Answer: Option D

Explanation: Let the third bumber be 100.

First number = 50 and

Second number = 100 - 54 = 46

Decrease = 50 - 46 = 4

Required percentage =
4
X 100 = 8.
50

2.
Find the Unit digit in the product of (268 X 539 X 826 X 102)?
Answer: Option C

Explanation: Product of unit digits

= 8 X 9 X 6 X 2 = 864

Required Digit = 4

3.
Number obtain by interchanging the digits of a two digit number is more than the original number by 27 and the sum of the digits is 13. What is the original number ?
Answer: Option C

Explanation: Let the original number be 10x + y

According to the Question,

(10y + x) - (10x +y) = 27

And x + y = 13

Now, 9y - 9x = 27

y - x = 3 . . . . (i)

y + x = 13 . . . (ii)

y = 8, x = 5

Requird Number = 10 X 5 + 8 = 58

4.
Find the sum of first 37 odd numbers?
A.
1369 B.
1368 C.
1367 D.
1366

Answer: Option A

Explanation: As we know, sum of first n odd numers = n^{2}

Here, n = 37

Required sum = (37)2 = 37 X 37 = 1369

5.
416 X 18 - 2288 = ?
A.
5199 B.
5200 C.
5221 D.
5002

Answer: Option B

Explanation: ? = 416 X 18 - 2288

= 7488 - 2288 = 5200

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