Problem 1 :

Represent the following sentence as number

"Forty lakhs seventy two thousand two hundred and fourteen"

(A) 4872240           (B) 4822721          (C) 4872214

Solution

Problem 2 :

Write the successor of the number "5999999"

(A) 5999910           (B) 6000000           (C) 5910100

Problem 3 :

Fill the blank with suitable number.

54 ____ 562. This number is divisible by 3.

(A) 3                   (B) 2               (C) 1

Problem 4 :

Multiply 284 by 101

(A) 28564                (B) 28684               (C) 25563

Problem 5 :

The length, breadth and height of building are 75 m, 45 m and 25 m respectively. Find the largest length of a rope that can measure the length, breadth and height of the building an exact number of times.

(A) 6 m             (B) 5 m                (C) 4 m

Problem 6 :

Two boys run on a circular track. They start at the same time. They take 12 minutes and 10 minutes respectively to go round once. Find at what time they will run together?

(A) 50             (B) 60               (C) 70

Problem 7 :

Subtract the following

(A) 522.224        (B) 516.321          (C) 555.124

Problem 8 :

A fruit merchant bought mangoes in bulk. He sold 5/8 of mangoes. 1/16 of the mangoes were spoiled. 300 mangoes remained with him. How many mangoes did he buy ?

(A) 640                  (B) 520                (C) 960

Problem 9 :

The ratio of the number of kilometers traveled by a car to the number of liter of petrol consumed by it is 9:1. If the car travels 108 km.Then how much petrol wold it consume ?

(A) 12 liters        (B) 15 liters      (C) 18 liters

Problem 10 :

8 workers can build a wall in 12 days. How much days will 15 workers take to build the same wall?

(A) 3 days                (B) 8 days             (C) 7 days

(1)  From 10 to 19 there are 10 numbers

(2)  20 to 29  =  10 numbers

(3)  30 to 39  =  10 numbers

(4)  40 to 49  =  10 numbers

(5)  50 to 59  =  10 numbers

(6)  60 to 69  =  10 numbers

(7)  70 to 79  =  10 numbers

(8)  80 to 89  =  10 numbers

(9)  90 to 99  =  10 numbers

So, there are 90 two digit numbers.

The roman numeral of XVII is 17.

800  =  2⋅2⋅2⋅2⋅2⋅5⋅5

=  25⋅52

12=  12 x 12

To find the greatest number which divides 63 and 80 leaving the remainders 3 and 5, let us subtract 3 and 5 from 63 and 80 respectively and find highest common factor.

63 - 3  =  60  ==>  5⋅2⋅2⋅3

80 - 5  =  75  ==>  5⋅5⋅3

HCF (60, 75)  =  5⋅3 ==>  15

So, 15 is the greatest number.

546.925 - 52.68  =  494.245

Weight of 20 quires  =  12.5

Weight of 1 quire  =  12.5/20

=  0.625

=  625/1000

=  5/8 kg

=  40% of 160

=  (40/100) ⋅ 160

=  64

Let x be the unknown.

Average of three numbers  =  21

(18 + x + 20)/3  =  21

38 + x  =  63

x  =  63 - 38

x  =  25

5 men complete the work in 20 Days by working 8 hours per day.

It means by working 8 x 5 - 40 man-hours per Day the work will be completed in 20 days.

It will be Lesser days.

(40/ 80) x 20 days = 10 days

Hence, 8 men working for 10 hours in a day will take 10 days to complete the work.

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