Question 1

Direction: What should come in the place of question mark (?) in the following number series? 24, 25, ?, 41, -8, 73

Accepted Answer

The pattern followed is

Question 2

There is a three digit number. The digit at the tenth place is 3. If the place of all the digits are replaced with each other symmetrically about the tens position,then the new number obtained is 396 more than the original three digit number. The su…

Accepted Answer

Ans. Let digit = xyz Given y = 3 According to the question = (100z+10y+x) - (100x+10y+z) = 396x99z-99x = 396 Z-x = 4 Also, Z+ x = 14 Solving (i) & (ii) Z = 9 , x= 5 The original number is 539

Question 3

There are four consecutive even integers. Sum of the reciprocals of the first two number is (11/60). Find the reciprocal of third largest number of the series.

Accepted Answer

Ans. C. Let 4 consecutive even numbers are x, x+ 2, x+ 4, x+ 6 According to the question - 1/x + 1/x+2 = 11/60 x+2+x/ x(x+2) = 11/60 2(x+1)/x^2 + 2x = 11/60 120x + 120 = 11x 2 + 22x 11x 2 - 98x – 120 = 0 So , X = -24/22 , 10 X = -12/11 , 10 So, the numbers will be 10,12,14,16. Hence, Third largest number = 14 Reciprocal of third number = 1/14

Question 4

What will come in place of the question mark (?) in the following number series? 3240, 540, 108, 27, ?, 4.5

Accepted Answer

Ans. 540 = 3240/6 108 = 540/5 27 = 108/4 ? = 27/3, i.e. ? = 9

Question 5

What will come in place of the question mark in the series below? 3, 5, 15, 45, 113, ?

Accepted Answer

Ans. 5 = 3 + (13 + 1) 15 = 5 + (23 + 2) 45 = 15 + (33 + 3) 113 = 45 + (43 + 4) ? = 113 + (53 + 5), i.e. ? = 243

Question 6

What will come in place of the question mark in the series below? 2, 17, 89, 359, 1079, ?

Accepted Answer

Ans. 17 = 2 x 6 + 5 89 = 17 x 5 + 4 359 = 89 x 4 + 3 1079 = 359 x 3 + 2 ? = 1079 x 2 + 1, i.e. ? = 2159

Question 7

Which of the following will yield a reclining decimal?

Accepted Answer

9024

Question 8

How many numbers are there from 300 to 650 which are completely divisible by both 5 and 7?

Accepted Answer

10

Question 9

Find two natural numbers whose sum is 85 andtheleast common multiple is 102.

Accepted Answer

Let a + b = 85→b = 85 –a LCM(a,b) =102→ab = 102 k→a(85 –a) = 102k, where k is a natural number.

Question 10

The sum of two numbers is equal to thrice their difference. If the smaller of the numbers is 10 find the other number.

Accepted Answer

Let larger number be x and smaller number be y. Also, y = 10 According to question, ⇒(x + y) = 3((x –y)⇒(x + 10) = 3(x –10) ⇒2x = 40⇒x = 20

Question 11

Which one is the largest among the fractions (5/113), (7/120), (13/145) and (17/160)?

Accepted Answer

17/160

Question 12

What least value which should be added to 1812 to make it divisible by 7, 11 and 14?

Accepted Answer

36

Question 13

Which value among 53, 64,126,27612 is the largest?

Accepted Answer

27612

Question 14

How many numbers divisible by 125 can be written by using all the digits 2,3,8,7,5 exactly once?

Accepted Answer

4

Question 15

How many numbers are there between 1 to 200 which are divisible by 3 but not by 7?

Accepted Answer

57

Question 16

By which least number should 5000 be divided so that it becomes a perfect square?

Accepted Answer

2

Question 17

A fraction becomes 6/5 when 5 is added to its numerator and becomes 1/2 when 4 is added to its denominator. What will be the value of the fraction?

Accepted Answer

7/10

Question 18

How many numbers less than 200 are multiples of both 5 and 6?

Accepted Answer

6

Question 19

What is the value of 232 ?

Accepted Answer

512

Question 20

What is the digit in unit's place of the product 51 x 52 x 53 ...... 59?

Accepted Answer

0

Numbers Questions